Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b8e0e5fc31a2ad…

MALICIOUS

PDF

288.0 KB Created: 2022-04-12 02:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 452dd037bbd174ccb743c4eb7a558ec3 SHA-1: 3091dc264a94488f369fc824efc28eba6ec38624 SHA-256: 88b8e0e5fc31a2ad78309afbd7f9519d2997c39e9b7e91e1f1c8287c4ca6f9f3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a compromised WordPress upload storage, and another to an SEO redirector disguised as a software download. The ClamAV detection and ML classifier further indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5647

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://sunuf.co.za/XSRYdR1H?utm_term=sony+digital+voice+editor+windows+10 PDF link annotation
    • https://kozmetikadunakeszi.hu/userfiles/file/lokadexoparisogeririfapuv.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/gekidusidejimujixo.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1623ea4ec7662d---33107865103.pdfIn PDF document text
    • https://olympicaccessoriesbd.com/assets/ckeditor/kcfinder/upload/files/27023416667.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/wabafokizobuwilifuxabu.pdfIn PDF document text
    • https://nijolonarezop.weebly.com/uploads/1/3/3/9/133999518/55f32a.pdfIn PDF document text
    • https://gopazagopib.weebly.com/uploads/1/4/1/2/141250330/buvirokujiki_getolevidif.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/81353829029.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/wuvigagixosamuloxuxuxup.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/vepakaruzegigonobudoxobef.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16248561b24aaa---pawuluv.pdfIn PDF document text
    • https://macarthurgeneralslax.com/userfiles/files/12116842500.pdfIn PDF document text
    • http://www.studioamorosi.com/notizie/allegati/zevaxufivodozuxow.pdfIn PDF document text
    • http://loxocongnghiep.com/MINH/user_files/file/vowavid.pdfIn PDF document text
    • http://webhoctot.com/app/webroot/uploads/files/zamaxobawoxaromupepob.pdfIn PDF document text
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/2646325.pdfIn PDF document text
    • http://mitrasejati.co.id/assets/kcfinder/upload/files/xevuxegip.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/gazeperanobotoviwefa.pdfIn PDF document text
    • https://webmanagement.markholz.ro/images/file/zufexonaperolavu.pdfIn PDF document text
    • https://lengthening-sldf.fasamra.com/userfiles/file/41865606424.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/65321033506.pdfIn PDF document text
    • http://lemarsk.sk/kcfinder/upload/files/warusododisaj.pdfIn PDF document text
    • http://ambulans24h.pl/userfiles/file/76840394865.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1621d64ea0e2dc---wimokisut.pdfIn PDF document text
    • https://pujazoja.weebly.com/uploads/1/3/4/8/134880569/kajumetofesumus_kovus.pdfIn PDF document text
    • https://nodanolajidem.weebly.com/uploads/1/4/1/3/141395693/4652824.pdfIn PDF document text
    • http://kawarulabo.com/app/webroot/js/kcfinder/upload/files/sesamusosuvorulur.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/ledisarotakapotagi.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/febujot.pdfIn PDF document text
    • http://submission.jpvm.kr/pds/userfiles/files/96084975159.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/72823529772.pdfIn PDF document text
    • https://esoft.com.bd/assets/ckeditor/kcfinder/upload/files/sexofurupebara.pdfIn PDF document text
    • https://deverfgrossiercms.deindrukdemo.nl/upload/files/luxajemuw.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/6e6cba9331c8.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/1166371765.pdfIn PDF document text
    • https://salonrewards.ca/images/file/79481189042.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/162492671755cc---jewakepetot.pdfIn PDF document text
    • http://alvitraders.com/files/fogiguban.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/tezijobuje.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202204010212052459.pdfIn PDF document text
    • https://businesslife.com/content/files/fumaves.pdfIn PDF document text
    • http://3asoft.vn/img/files/sujubufopedipofogin.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20220319070752.pdfIn PDF document text
    • http://theblare.com/image/upload/file/87281646214.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    +3 more URL(s)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00040caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40CAA 11060 bytes
SHA-256: 1f8de414832a42e7265fa82c9da6d7a6d538e80c59cf74de83badbab9fd4682d
font_01_sfnt_off00042676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42676 18476 bytes
SHA-256: c7d45cf4539160f89f07ed98dc8e2e69071ca9ad2d28ab31c44ff5d25aab6724
font_02_sfnt_off0004572d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4572D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1