Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f0358080bcb3b2…

MALICIOUS

PDF

73.1 KB Created: 2021-01-11 19:22:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8c85f3e16262f47d0c2f50ae7c46c914 SHA-1: e9b27251ea3fcab9bcae0156f72c205ada39d861 SHA-256: e8f0358080bcb3b20276f9cb7a9b291b3c61f5686118ef489337391a982e6246
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Agriculture in tamil pdf free'.

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://trafffi.ru/aws?utm_term=agriculture+in+tamil+pdf+free PDF link annotation
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/5f054e78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459631/normal_5fcc01235ad44.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/lumef_dijedoxedirugun_bodomuvitavas_texetevaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5fd64c6fe2363.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/8747612.pdfIn PDF document text
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/ripibi.pdfIn PDF document text
    • https://veledagovivavav.weebly.com/uploads/1/3/2/6/132681602/dfbc1.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/8176664.pdfIn PDF document text
    • https://soberonapi.weebly.com/uploads/1/3/2/6/132681790/dcf0e20bb6.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/zezefe_netosipijezoguf.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/938454.pdfIn PDF document text
    • https://votawaxamudogop.weebly.com/uploads/1/3/4/4/134400347/xologatexarabekiwix.pdfIn PDF document text
    • https://nepopuzabigeju.weebly.com/uploads/1/3/4/8/134856357/a1b3d81.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/leguvefu/work_energy_and_power_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/aarakshan_movie_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/56975314667.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_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 5284 bytes
SHA-256: c367446c7250794272e299d111765cd277d90f0e03832261159890d72c585304
font_01_sfnt_off0000f50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 10000 bytes
SHA-256: a91af96294cf85617785bc56e7be0f3417f5170870f98426add3d58ce4473c81

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