Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d34bb95ced56c2…

MALICIOUS

PDF

70.1 KB Created: 2021-01-12 00:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bf6c3808d13c40c75522b2aa9c54406e SHA-1: c060d8baddbf40a0dfcbbaef5515c875cdd60f7e SHA-256: a9d34bb95ced56c2502e96c29fadbcdfcd84a167403ea0b2ff15a178d0018c8f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing attempt. It contains numerous embedded URLs, including one pointing to 'traffking.ru', which likely serves as a landing page for credential harvesting or malware distribution. The document's structure and the presence of multiple disposable hosting links suggest a link farm designed to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://traffking.ru/aws?utm_term=form+2441+child+care+expenses PDF link annotation
    • https://site-1211506.mozfiles.com/files/1211506/92440380244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_5fd1b89ed94d9.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/sadenukifirew_tiloxisu_gujesovijagux_jazuvubusawolo.pdfIn PDF document text
    • https://site-1178332.mozfiles.com/files/1178332/politics_and_prose_hours.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5fe4700ef0dfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5ff59eb45bfde.pdfIn PDF document text
    • https://xowebanum.weebly.com/uploads/1/3/1/4/131453595/8944014.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/iahiher/mma_mania_predictions_prelims.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/igNgcjb/movie_night_snacks_delivery.pdfIn PDF document text
    • https://site-1166597.mozfiles.com/files/1166597/dwight_eisenhower_quote_on_military_parade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5fe9230e771fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f8fcc54c4a61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5ff38490b212b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD502 5608 bytes
SHA-256: 2cac95f444ac5539d76139401abe068bd33683e28948a7664cdd2cbdbaa43713
font_01_sfnt_off0000e7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F7 10592 bytes
SHA-256: 9f4e4fff54279e29447e32dd647ac8e7f12f35872e42cbff161325ebdd497def

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