Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fe5073285648e4…

MALICIOUS

PDF

67.2 KB Created: 2020-12-18 13:34:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ff30a20fee0116ab4c5c84a5d86c3126 SHA-1: d0fe737e67fac899145f7fd4d0124d25f28cf7a9 SHA-256: 35fe5073285648e4e9eb238ed8e82edfb1155166c0769e7334df980cbb3e4ed9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?utm_term=vampire+academy+book+6+pdf PDF link annotation
    • https://xogiwudib.weebly.com/uploads/1/3/4/7/134715522/xifakugagedele_maginipu.pdfIn PDF document text
    • https://pilorixo.weebly.com/uploads/1/3/4/6/134689004/8694179.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8742796.pdfIn PDF document text
    • https://jedufopev.weebly.com/uploads/1/3/4/4/134490540/tamosukerivasuwofi.pdfIn PDF document text
    • https://wufenimikefi.weebly.com/uploads/1/3/4/3/134366244/11600929c2.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/wadalopeguvo.pdfIn PDF document text
    • https://pelosewedi.weebly.com/uploads/1/3/4/7/134753512/kejoximutu.pdfIn PDF document text
    • https://mebijakonenu.weebly.com/uploads/1/3/4/4/134458360/jurilab.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/wogipoxag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc56cf33398ff75154c3629/t/5fca4b59e262c015946f936d/1607093082116/78489486344.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0c67848ba205d186e02/t/5fc251281972c46e3ce9e5fa/1606570281129/86286019030.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdfdf989ef447dc9d2318d/t/5fcf93a37379aa35977d9336/1607439268693/3765225727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c1ebc6f-9aa3-4021-b3bc-202326946601/vuwem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc826ac3cfda2dcf0aa550/t/5fdc90453bd3a53b5e8a51c4/1608290374055/pasoxevuxolupe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7d305fcdb718a17c69c1/t/5fdc939688acf70241be1c9a/1608291224401/vepob.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_off0000c832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC832 5516 bytes
SHA-256: e23ded7ab3336a2f69a3ee649ed9e494193913019f73daf096a4a5bd81e73b39
font_01_sfnt_off0000daec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEC 10456 bytes
SHA-256: 75ea5e2eacca0d0a174aebdff1e91537ad64321e28f2a0f534b0cc0ce42f9415

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