Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6683fd6cdf6e36b…

MALICIOUS

PDF

67.5 KB Created: 2020-11-17 02:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 98f0715f9ec5a0db86b70bfa7cda1844 SHA-1: fe17097778f1fdb9632f3a6ab282a3bd8976b62a SHA-256: c6683fd6cdf6e36bd9b39918a93c0d017b3c327a1cf425d9bd06eb6ece81283d
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to various PDF documents hosted on disposable domains. The primary URL, 'https://trafftec.ru/123?utm_term=football+training+equipment+for+lineman', suggests a potential lure for users interested in football equipment, which is likely a pretext for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to distributing further malicious content or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafftec.ru/123?utm_term=football+training+equipment+for+lineman PDF link annotation
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/jomukirenetalezatobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5f9baf326a71a.pdfIn PDF document text
    • https://tirasuvemesamu.weebly.com/uploads/1/3/4/6/134672388/saxefof-kajolidotaj-juwesu-xawose.pdfIn PDF document text
    • https://jivoxafur.weebly.com/uploads/1/3/4/3/134382284/mazekolomadipetuf.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/bobizagumulogiz-vawenedubedolab-zenixedigix-busokokeluraj.pdfIn PDF document text
    • https://zajubazo.weebly.com/uploads/1/3/4/4/134452036/86a0e0a9.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/kodinukiwekijobafis.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/dfa9e34d.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/5476235.pdfIn PDF document text
    • https://tepunejor.weebly.com/uploads/1/3/4/6/134636279/209610.pdfIn PDF document text
    • https://mivubifazexaj.weebly.com/uploads/1/3/4/3/134381565/toruxuwibedixev-tuwuvejutebu-fonapu-jodudasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_5f95161f457e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f879c396ccbf.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/mexavofezoxi/bsa_medical_form_part_d.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/92158331270.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_off0000cd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5C 5264 bytes
SHA-256: e7c855339e824b1295388099123af8f87f85960a069b436790868da72393eae1
font_01_sfnt_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 10012 bytes
SHA-256: 6694823c66d702b7852541f1a93cb91a0008797681b7bc55b44122e331a38f5a

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