Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee314b5bf5d7a95b…

MALICIOUS

PDF

60.1 KB Created: 2020-11-25 20:21:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 85a15936784cb2b8ba4b74cf7607b7d0 SHA-1: 735c5a907c8f5078200fce2738cd8905fa28353a SHA-256: ee314b5bf5d7a95ba62a94737c5e99199c1bac2324a1505a611474790831b7df
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it's a malicious redirector, specifically linking to an SEO-based lure for 'bodybuilding motivation images'. The primary malicious URL identified is https://traffmen.ru/wb?keyword=bodybuilding%20motivation%20images. While no scripts were directly extracted, the PDF structure and the nature of the URL suggest an attempt to lure users to a malicious site, consistent with phishing or malware delivery.

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
  • 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.
  • 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/wb?keyword=bodybuilding%20motivation%20images In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5fb03d7a8e8c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5fbcc801d0d86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/3136353600.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/pepilirusovimus.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/sigeganufovulagat.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/kotv_channel_6_news_reporters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5c17d0-51f0-4287-ab9d-f3320f81131a/23240925477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8393771-b180-4241-8cdc-0dc3c0d9de46/43924595663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47996f6c-dd23-4a94-a105-0d6ebcca1c53/53851838272.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/gubipuxotorigalomexi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/saduravuburu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0F 5400 bytes
SHA-256: 68c0858c1033f1712f2e122c766d0034270c03465607d398a52a8b80714b77f6
font_01_sfnt_off0000c06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC06D 10532 bytes
SHA-256: 3e1acd528cc30175c06a8f457548022b39871a8bfe6770eb68f4f1d8af6fa4d8

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