Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8868838120ce3e…

MALICIOUS

PDF

307.8 KB Created: 2021-12-31 03:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: d5eaa612a6a9688ea5bb4431caca0ff5 SHA-1: 3b1982f84f51d98ffa7020aae2351b96835b7046 SHA-256: aa8868838120ce3e5f81517e70d53e10c454b4b7788717ecd940d9df1a8bda9c
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7819

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161706f7980759---79777273560.pdf In PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/dae8394639548f46d5b1f4cdb795afe4/63483735922.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/45348262779.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/16119153643.pdfIn PDF document text
    • http://synowka.pl/galeria/file/nosavevavumezanavumiga.pdfIn PDF document text
    • http://www.farimar.pt/imgs/uploads/dilugibusevid.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/70323503608.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/81088059232.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210910095314032.pdfIn PDF document text
    • http://bahiratpatil.com/kcfinder/upload/files/22766538482.pdfIn PDF document text
    • https://tomaszbizon.tomaszbizon.pl/web/uploads/files/29257772033.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/5254836348.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/161b6da8a954aa---5268780375.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/derikawez.pdfIn PDF document text
    • https://1tlstar.com/storage/uploads/files/12051049632.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/vezonepunanadofolis.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/tofuwujixuwetipa.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/27225276626.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/vanipejuwubed.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/81677978327.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/sutajiw.pdfIn PDF document text
    • https://hotelcorona.ro/files/70661930999.pdfIn PDF document text
    • http://toys4boysleather.com/userfiles/file/zasabefa.pdfIn PDF document text
    • https://sezam-doors.com/userfiles/files/xowoxawalezerikiw.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/lamimix.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/EqozwcbAC44/uplcv?utm_term=baby+doll+me+sone+di+songPDF link annotation
    • 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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00045a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45A36 10700 bytes
SHA-256: ec4476d4377ca647cf6e3e62cfca38a6d7a7e79fbc1818dbb399e602856b3a45
font_01_sfnt_off00047283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47283 21400 bytes
SHA-256: 4b594342c09a7639e4322c30b116c94a813b7fd34f94cf673db2b020bf80d7ad
font_02_sfnt_off0004a9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A9F7 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336