Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9b58609b70f5d6…

MALICIOUS

PDF

70.5 KB Created: 2020-12-29 21:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9a8541b1b3b034a8da6ac6b78f149e13 SHA-1: da59a4347f6811fa8429d53774a94ed4a62e1f0c SHA-256: 7f9b58609b70f5d6c1522ef2b94dcffb13cf0d7cb7d383dd624e5e71086dc580
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL observed is https://trafffi.ru/123?utm_term=define+plural+of+synopsis, which is likely part of a link farm or phishing campaign. While no scripts were explicitly extracted, the nature of the PDF and the presence of numerous external links suggest it is designed to redirect users to malicious or deceptive websites, potentially for credential harvesting or malware distribution.

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 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.
  • 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://trafffi.ru/123?utm_term=define+plural+of+synopsis PDF link annotation
    • https://cdn.sqhk.co/bepotedaxus/aiehehc/funny_clip_tik_tok_video.pdfIn PDF document text
    • https://voromelub.weebly.com/uploads/1/3/4/8/134872571/6247237.pdfIn PDF document text
    • https://mobixunusam.weebly.com/uploads/1/3/4/8/134884540/ecd7ff49e03e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5f9351ee899f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365606/normal_5fcce4bf0aad4.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/0995ab0829f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f8a4f69843d3.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/RigdjRs/wedekevamamijuvebobi.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/dJierqr/samsung_family_hub_app_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xugikokazo/erM3Hji/pointers_basketball_aau.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/povodijirig/71191696787.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/sijelija.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/lisafifukugop.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_off0000d18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18F 4996 bytes
SHA-256: a2b2ca07cfeb94f24c23da75330a251bb9dea592409c96b0bfbaa735f1ecb463
font_01_sfnt_off0000e2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 12408 bytes
SHA-256: e5c6c26b7ffccbec1827b05e280b5b237dc126c3cf9c41d091d7781a6d98d710

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