Malicious PDF — malware analysis report

Static analysis result for SHA-256 88bb1d4f8e69974f…

MALICIOUS

PDF

460.7 KB Created: 2022-02-28 03:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 108ba6ff178c7863e2f06a0f3ec69d91 SHA-1: a4f43f8692efcebaff384f230008fb3d2829104f SHA-256: 88bb1d4f8e69974f895efe10b0e5d367bb6a53e419238a0dfd9f87e4c227d345
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4057

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://loheb.co.za/XSRYdR1H?utm_term=free+fourth+grade+rounding+worksheets PDF link annotation
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xokuxeruseju.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/maxobuwoma.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/gojovowavizimibukazusemo.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/lizidazunizakudomutaw.pdfIn PDF document text
    • http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/bipelonabetodufe.pdfIn PDF document text
    • http://www.heksan.com.pl/file/8259195131.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/90922738482.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/17612824073.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/161245e7da65ec---36137815812.pdfIn PDF document text
    • https://aademvegabaja.org/images/image/13439066860.pdfIn PDF document text
    • http://airserbia2009.vs.rs/multimedia/file/82516673909.pdfIn PDF document text
    • https://xebecdesign.com/xebec/userfiles/file/rukodabokumogutumaxetuwu.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/tatubem.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/10580789259.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/nedozukodabawabozu.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/74556335526.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/kuvolonibe.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/63680244005.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/gefuzokode.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/bamegawuketuve.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/d8a03ae58333957e9ebd812f28105c2f/55020022165.pdfIn PDF document text
    • https://susta.vn/userfiles/file/xutadolizeworetewus.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/tivelebojiweludurab.pdfIn PDF document text
    • https://chp-travel.ir/data/file/54378571653.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/pewuxetezotuzejefopakur.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/19522966488.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1619f7f74c8e5a---44703800795.pdfIn PDF document text
    • https://deepex.hu/hirek/files/11162226202.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/sejowonenetakivalanaf.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/uiij7tsnv2m4477av9adcofu32/60866229019.pdfIn PDF document text
    • https://baongochoa.com/upload/file/sunolisuzuvixopivofosuw.pdfIn PDF document text
    • http://auto-fiesta.ru/upload/files/vivugagujekusuziw.pdfIn PDF document text
    • http://cadex-forensique.ch/app/webroot/kcfinder/upload/files/bowukix.pdfIn PDF document text
    • http://katela.net/userData/board/file/21768404254.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/vufoxamanatikovawuvef.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/gegit.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/25180236028.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/61233527255.pdfIn PDF document text
    • http://kietminhrivet.com/upload/files/pelagijatel.pdfIn PDF document text
    • https://kpk.1c.ru/admin/rc/ckeditor/kcfinder/upload/files/41413563826.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
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0006c39f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0006c39f.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006c39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C39F 18228 bytes
SHA-256: 29e62bb86c8198619a84d53bbdccedb7a1c6b7408a1d9c4783efeb839ba2d75d
font_01_sfnt_off0006f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F275 10844 bytes
SHA-256: f6b86e9530b40b0f8623b14f22f07a31c9e63bd072f0102414b87b791639f034
font_02_sfnt_off00070b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B4F 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9