Malicious PDF — malware analysis report

Static analysis result for SHA-256 d954cc13f971a88a…

MALICIOUS

PDF

70.7 KB Created: 2021-02-12 01:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0602c84ee09b027d7b23b428b5e7ea0f SHA-1: 201f7202ef45da1f4f8a50982946e6cb4224dd3d SHA-256: d954cc13f971a88a01e0dd0b7725d34be4ff057ef091bc04b912af152d18f3c3
126 Risk Score

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://leonvi.ru/wix?keyword=the+bass+the+river+and+sheila+mant+theme PDF link annotation
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/semujopodujadawera.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/KUjjFhi/84879760031.pdfIn PDF document text
    • https://tazesudi.weebly.com/uploads/1/3/0/9/130969012/folamugenup.pdfIn PDF document text
    • http://gesabagipo.22web.org/animoto_video_maker_apk_mania.pdfIn PDF document text
    • https://cdn.sqhk.co/razilipot/hgfjjRO/64874732429.pdfIn PDF document text
    • http://nigufuf.iblogger.org/jefopom.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/FjhhcFc/fidget_spinner_simulator_roblox.pdfIn PDF document text
    • https://vofirojaj.weebly.com/uploads/1/3/1/6/131637635/f181c596fdb.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/123966d9dd725.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/jgmhuja/wokaguvanapuse.pdfIn PDF document text
    • https://fijoxivivuf.weebly.com/uploads/1/3/4/0/134041864/kedidovi.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/nupotukig/environmental_science_and_technology_guide_for_authors.pdfIn PDF document text
    • http://pesafitibum.epizy.com/ioi_properties_group_berhad_annual_report_2017.pdfIn PDF document text
    • http://vigiraporonom.rf.gd/chol_gori_song_free.pdfIn PDF document text
    • http://mevusajilitum.rf.gd/electronically_controlled_manual_transmission_disadvantages.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/navy_blue_nurse_uniform_dress.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_off0000cc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC86 4892 bytes
SHA-256: c6077ce79018a1c6969df4eada8cabb0d3152dec9c735abf07efd3071d9ccb82
font_01_sfnt_off0000dcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF2 10044 bytes
SHA-256: 65185e66711d1ede8b43be52028880179df2e7576854dd5f72eb8838e87757ae
font_02_sfnt_off0000ff7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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