Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce94b64c64fde8a9…

MALICIOUS

PDF

78.6 KB Created: 2021-05-28 14:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d5de7fa3dbe246183924bbff2a2f714e SHA-1: bdc55371c5ce61af83c29415384e2eb0c5053cce SHA-256: ce94b64c64fde8a98d48bc6e70b367d6a192ab2566de1e2f8ac14972c0ce99e2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The PDF contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation or distributing malicious payloads. While no scripts were explicitly extracted, the presence of external URIs and the nature of the link farm suggest an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=alexandra+stan+saxobeats+album PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455178/normal_6002049acd000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_60328f05b4a36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454809/normal_600a531c27b65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_6043fe1967154.pdfIn PDF document text
    • https://jasunibimagimuf.weebly.com/uploads/1/3/4/7/134733129/sisezesabem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_600ae26c9d640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477173/normal_603d5f30ea012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_601f692311539.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390324/normal_5fcba8b3660f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5fd79792c26ef.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/kovefazim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_605b88f479e16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fcdd9eaab171.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4369907/normal_60b0b58dbbc5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488572/normal_6049ee27534eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404745/normal_5fc76ff63beb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bfa546b4-2f41-4e1a-ac2f-2cff1f3b04aa/bibakasoloxaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037d6063-0ce6-4076-9f27-7047de2d9fa2/how_long_to_cook_waffles_in_a_mini_waffle_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956a6806-f337-438f-8617-9e2309f999f5/how_to_solve_linear_equations_with_multiple_variables.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4F 5004 bytes
SHA-256: 3ed25348d3e03c38c19e51d08c73b49d90911fe5d7557fbee1311a736a1dc4fc
font_01_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 16256 bytes
SHA-256: 6aaa95df54263cec7646fba968f3e670f4e723f8687540bc0314d4e1e6bc4bb7
font_02_sfnt_off00011f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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