Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12647eeb282c8bc…

MALICIOUS

PDF

73.9 KB Created: 2021-05-14 20:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c59ec6ca1abb668ce9aebe9095a6dae9 SHA-1: 7baf3944f62a924e8825d2202ba2a12b4e2128c6 SHA-256: c12647eeb282c8bc59fa7d95bd1c2dd8c641b36d6a5b869f3605e3bf937eab6a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to external sites. The document body contains text related to 'Cessna parts distribution', suggesting a lure to attract victims. The presence of numerous external links, including one to 'https://pelibifir.ru/strik?utm_term=cessna+parts+distribution', indicates a phishing or malware distribution attempt.

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://pelibifir.ru/strik?utm_term=cessna+parts+distribution PDF link annotation
    • https://gabavogafev.weebly.com/uploads/1/3/4/0/134000006/4231480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404103/normal_6037881ee08e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_6039c1caa8625.pdfIn PDF document text
    • https://pisolani.weebly.com/uploads/1/3/4/6/134668870/d33cf23de4.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/ehhhhia/jixuvobesoferobowisog.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/1333033.pdfIn PDF document text
    • https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/1166066.pdfIn PDF document text
    • https://tidijesugeji.weebly.com/uploads/1/3/4/7/134764535/061aea945f90f.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/cijthbR/free_game_recorder_for_mac.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/kotovegegisifow.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/hg2fhb7/clouds_lyrics_zach.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/23bbc546f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471236/normal_5ff7946e8c6bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_242b33225b4c4dd1a39d9ee7d820118d.pdf?index=trueIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_c081d969c7b24241b7b6fecf10dde732.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/perurulexi/hotel_reservation_format_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/dupupolenig.pdfIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_8c47542b056548b4a92ee6bc3c0ff8fe.pdf?index=trueIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_6e258ad5ef3e4a089ea636fe9d287446.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_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 4964 bytes
SHA-256: 1587f539464fb590ca38c94310189606895012add84c06d46d27119274725993
font_01_sfnt_off0000f46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 11236 bytes
SHA-256: 79231cc285f3fee4f77d706d66c0177018b4193398ebbf0b084a32a6862d736a

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