Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a8e4b10acfc709…

MALICIOUS

PDF

91.7 KB Created: 2021-01-15 14:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e383688c5a44a7f2e07fbaa37ce2a222 SHA-1: 7cbdd1fb6aba64aa94ebbd130e20ffd3e161a566 SHA-256: 27a8e4b10acfc7097aad3a5973985d50f56e2ac7293bd5476342c7478f6accef
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links to external websites, many of which are identified as redirectors to malicious infrastructure. The heuristic firings indicate it is acting as a link farm, likely to distribute phishing content or malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://traffmen.ru/123?utm_term=assault+mode+activate+tips In PDF document text
    • https://cdn.sqhk.co/roretuduva/igicieq/escape_horror_piggy_game_for_robux._new_chapters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5fa5b905cdaeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f8c2250272ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f889a523e789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f93e82dd1891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_5fdc7d75057ab.pdfIn PDF document text
    • https://nugekepujipa.weebly.com/uploads/1/3/4/3/134318644/pelomigesuv-fozagamaj-vejibufisamago.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5fc51258832c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409806/normal_5feb0bfe9343b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_5faf3b5ca2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_5fa657dc64b73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423780/normal_5feb36fbebb16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404497/normal_5ff2533632fb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 5172 bytes
SHA-256: c8b7ff9d34b08fd1478ba8871d2285d790882be03e79022634f59ea6bd701105
font_01_sfnt_off000116b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B1 2140 bytes
SHA-256: fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2
font_02_sfnt_off0001208b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208B 11952 bytes
SHA-256: e2db8f5a48cc9508b40dd924ca056016d70aa368c64eb874df23c91c8539e8c3
font_03_sfnt_off0001499a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1499A 16716 bytes
SHA-256: 31b0f88f8ab213b2d0efb1604e9e92ec04882cab675f7e0285d55621881b0c23