Malicious PDF — malware analysis report

Static analysis result for SHA-256 459c5b86b385143e…

MALICIOUS

PDF

72.4 KB Created: 2021-06-14 12:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 868418fa6c53dd4aefa9c47c80af638c SHA-1: 2e1020ca73b2a2f08d67e3f26298d689587c7f15 SHA-256: 459c5b86b385143ee8251eafa763636e44a25a821017d8a3d0406d4c19ca0231
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 0.9996

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://archism.ru/pbw?utm_term=tamilyogi+tamil+dubbed+hollywood+movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498376/normal_60c42cefa1314.pdfIn PDF document text
    • https://kotogafisix.weebly.com/uploads/1/3/0/7/130740127/mofamepesuxew_lexijafawelozos_vebinupupif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386594/normal_6009553d4c8c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_60256fa730dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464996/normal_605b89433816f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374704/normal_5fe2de4818856.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4381730/normal_60b0946865e0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491925/normal_5fe128822b41f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4418369/normal_60b336b49e177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_605cb8af56cce.pdfIn PDF document text
    • https://pavenepono.weebly.com/uploads/1/3/1/3/131383439/togamu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d9d5d68-ba5c-4180-a7d7-9ffe9f7325ce/58780614865.pdfIn PDF document text
    • http://sapagujedok.pbworks.com/w/file/fetch/145196973/19448891454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad9e45d-8b09-4ae6-9888-5933d3fa2db8/multiplication_chart_1-10000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0b6336-80e4-4880-909c-20a0c2046940/28071327593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d8a63d-fa13-4ee9-92d4-537b6a525024/smart_board_projector_price_in_india.pdfIn PDF document text
    • http://xugilip.pbworks.com/f/99590820379.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144526578/chess_tactics_free.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/w/file/fetch/144616383/collection_on_facebook_nyt_crossword.pdfIn PDF document text
    • http://mokakiw.pbworks.com/w/file/fetch/145172775/budget_murloc_paladin.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/comment_faire_pousser_les_cheveux_crpus_plus_vite_astuce_maison.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_off0000dbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC0 5484 bytes
SHA-256: ae08120d3b83a11a3fcf8203c2651bf26aa4022989501f7a24669bb119ffab05
font_01_sfnt_off0000ee60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 10560 bytes
SHA-256: 87f76c299b6e3fefe965edc93532f009814db61586a800cdb488cef92ac1d743

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