Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7e0995bc94f7fc…

MALICIOUS

PDF

76.8 KB Created: 2021-05-09 11:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 01747834ad653f991ac360e83572c0a3 SHA-1: 2520a2b24994a43dfa731af2a88d98c2a004e6ae SHA-256: ac7e0995bc94f7fc5cdce5c10a02eac0b29711f8a2c05ce85f4e80c93a5d7d6a
186 Risk Score

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 high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm or SEO scam designed to drive traffic to malicious sites. The embedded URLs and the document's structure point towards a phishing or scamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=1956+johnson+10+hp+outboard+parts PDF link annotation
    • https://paporese.weebly.com/uploads/1/3/1/0/131071113/bufifagizovuwuma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485166/normal_603200f808f06.pdfIn PDF document text
    • https://tusopapa.weebly.com/uploads/1/3/2/7/132712380/5168516.pdfIn PDF document text
    • https://boxagabopevonud.weebly.com/uploads/1/3/4/3/134353696/9057779.pdfIn PDF document text
    • https://nenejiremox.weebly.com/uploads/1/3/0/9/130969141/nureraba.pdfIn PDF document text
    • http://dejiloka.22web.org/4945599266.pdfIn PDF document text
    • https://sosanibizug.weebly.com/uploads/1/3/2/6/132695556/6658130e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446395/normal_5fe8ca52675d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468553/normal_600030b7a2d94.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/37936c9f29594.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/foleroxarufag.pdfIn PDF document text
    • https://wuvobarapupi.weebly.com/uploads/1/3/0/8/130813490/1583887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_601dd4e347f33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387825/normal_5fcc643b7640b.pdfIn PDF document text
    • https://zojotivomon.weebly.com/uploads/1/3/4/3/134338266/b78f0d079e2df.pdfIn PDF document text
    • https://morewunopidov.weebly.com/uploads/1/3/4/8/134895133/3dda796275a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuwuwiri.rf.gd/mopojifituwowenuto.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_13c585bfad504f76b9618305a20b36b0.pdf?index=trueIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_ffeb58f2f454480cb3eab3cf9fdebb94.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_194676cad18049f486d71b0db077b4e0.pdf?index=trueIn 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_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 5764 bytes
SHA-256: 6a0198f72318c97a4704a7afd6cd4877dd94dd4c038759c9a8c45c070e09b437
font_01_sfnt_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 10332 bytes
SHA-256: a881634275a9615ad61a4a9794216942a01f8db4cef069d6cc931adee8565c7b

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