Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13c4af03f1afd16…

MALICIOUS

PDF

80.0 KB Created: 2020-12-28 10:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7de4aad8c60db369cc6dd62572b264f0 SHA-1: 16728d31619cf2b41139dac9d307903e74b08056 SHA-256: c13c4af03f1afd16963c4b36a631fab5e14dac365ade983362d1d5bca0f33bc2
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded external URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL suggests the document's purpose is to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://traffset.ru/123?utm_term=a+rolling+stone+gathers+no+moss+is+an+example+of PDF link annotation
    • https://s3.amazonaws.com/gofiguj/hitman_4_blood_money_free_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/gadasebug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5fcbd4185ab1b.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/fzmovies._net_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/idcT1SW/rufeti.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/qjgigJw/25071388648.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/hp_storevirtual_centralized_management_console_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/ignou_assignment_bshf_101_hindi.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/gefOjeO/kujowibidesuduvu.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/noronowifumezugibazas.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/arizona_black_rattlesnakes.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/nysora_ultrasound_guided_epidural.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 5372 bytes
SHA-256: 4625568de17eaf69a9cbf0dfc9af1eed734d3767351f64c998d0b433cf78400a
font_01_sfnt_off0000f48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48B 11748 bytes
SHA-256: 4d3c0489dda75ab5df887b0375ef4ec3fb2bf5bf529121d5f2d4713fe4e41e12
font_02_sfnt_off00011bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC2 16756 bytes
SHA-256: 66ebc0a0ad91e65a10baeb16446991f67cccedd9ebfb903d71229f49e92537dd

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