Malicious PDF — malware analysis report

Static analysis result for SHA-256 b001650b9ce303b9…

MALICIOUS

PDF

79.0 KB Created: 2021-04-01 04:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a25749af70230f60614d665277dd7645 SHA-1: 95a23d769fe6c54468be301373f1652baa3274e7 SHA-256: b001650b9ce303b9331148694f3d7ca888405bda499f10afa8d7f5e551e85f9a
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 0.9990

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://midufefew.ru/strik?utm_term=flowers+for+algernon+film+ratings PDF link annotation
    • http://libralab.digital/geometry_similar_triangles_worksheet_answer_key0oe0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424692/normal_60033a3ba6fed.pdfIn PDF document text
    • http://pe50off.pro/modern_javascript_cheat_sheet1zc97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413119/normal_60030c9c474e7.pdfIn PDF document text
    • http://matcobzor.ru/clasificacion_de_los_seres_vivos_santillanaebqx1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_6046deefc0f06.pdfIn PDF document text
    • http://fdvsefwfrw.space/download_kuch_rang_pyar_ke_aise_bhiov1w9.pdfIn PDF document text
    • http://help-violation.com/health_and_safety_diploma_courses_in_uaejxd43.pdfIn PDF document text
    • http://prodive.su/gambero_rayleigh_menu644i6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_60225dc0f004c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419424/normal_6005bdb658122.pdfIn PDF document text
    • http://love-your-lips.online/que_es_una_propuesta_de_valor_unico6qo5w.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/i7hecji/bujepez.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/ThiuLol/85729638555.pdfIn PDF document text
    • http://sushibara.net/kavekipazank1tau.pdfIn PDF document text
    • http://brosbass.com/31117860340aulft.pdfIn PDF document text
    • http://confirmationhelpcenter.com/mafubifefezadepuzf4x4o.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/gehagds/xesexovujujukef.pdfIn PDF document text
    • http://streichpack.online/livujarutuzesiluzigebuxsoef6.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/gdjgLWO/votubupisefonaxefurik.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://uploads.strikinglycdn.com/files/a15d65c8-58b5-40c3-910c-b68efa9d5e85/safety_not_guaranteed_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c9da36-b1b0-4187-ab53-aae30f9294e8/global_economy_in_world_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c31c2e0-5a0f-4213-bda1-0c4a49223a54/26774173128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df884236-3f81-4115-a3d4-976ca8e842b7/26732496404.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_off0000ea99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 4924 bytes
SHA-256: 99a900e53b2470b5aeb7f2a47957c993e1202c475de95c35829ada7f418d3c54
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 10936 bytes
SHA-256: ef4c5c5f1088af875d1d07f8896e10545570214ad82af8ffdee0781357312b83
font_02_sfnt_off00012081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12081 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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