Malicious PDF — malware analysis report

Static analysis result for SHA-256 842e6f04874153c5…

MALICIOUS

PDF

81.8 KB Created: 2020-12-21 05:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: cdb8398872473764b580ef0a4c91765a SHA-1: 1354f66a052e2ac774b37a59e67030500c1d823c SHA-256: 842e6f04874153c53427564ada28bd02fb6a85fbf2a52ab3ff7ee9a8866e2d7b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The primary URL, 'https://trafffi.ru/strik?utm_term=the+time+traveler%2527+s+wife+streaming+altadefinizione', appears to be a lure for streaming content, likely a pretext for phishing or malware delivery.

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://trafffi.ru/strik?utm_term=the+time+traveler%2527+s+wife+streaming+altadefinizione PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383340/normal_5f93b664360c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f870a436aa34.pdfIn PDF document text
    • https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/tiladobitubizumi.pdfIn PDF document text
    • https://tekoxinir.weebly.com/uploads/1/3/4/6/134606092/zakuvinutijugib_monadunomezi_rosegakes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456712/normal_5fa60a0c74950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411918/normal_5fb8913331d24.pdfIn PDF document text
    • https://rizenuwav.weebly.com/uploads/1/3/4/3/134335920/viparuvuse-nasenevejub-rivoxusomeko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418746/normal_5fe005409990e.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/263c552e.pdfIn PDF document text
    • https://sozeberanula.weebly.com/uploads/1/3/4/7/134774269/zelumemole_xazemulunabuga_lelof_gemewikinaxoban.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://s3.amazonaws.com/marimejerebo/canon_eos_r_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/modern_chemistry_textbook_answers_chapter_9.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/nijawopul.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_off0000f4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 5292 bytes
SHA-256: bd2b09a7ea3854fb75d6598699891a87b0effcfb7842e25b0abf04c7760e369f
font_01_sfnt_off000106ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BA 11068 bytes
SHA-256: 87c71cbf73e22e10f71f77c7c7205eb7d4e9e8db67ae631f43fe4cfc03eaa8f2
font_02_sfnt_off00012b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B95 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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