Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f33f6158d2f7af4…

MALICIOUS

PDF

64.0 KB Created: 2021-02-21 20:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ced3a9b169b31131f095fd9a7326df2d SHA-1: bdfe69c1cbc634799fcb27d341a100abb6b7019d SHA-256: 0f33f6158d2f7af4740e346d69bee835468761633d6537e7c209e04135b8d249
186 Risk Score

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://druttle.ru/wix?keyword=mollusks+and+segmented+worms+worksheet+answers PDF link annotation
    • https://davixiwawelugez.weebly.com/uploads/1/3/4/1/134133028/2815959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_600c140539a85.pdfIn PDF document text
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/094a2.pdfIn PDF document text
    • http://pinudub.iblogger.org/37979845084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490001/normal_601627ce6ac42.pdfIn PDF document text
    • https://pomudimukiribob.weebly.com/uploads/1/3/5/3/135313003/9409767.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416496/normal_5ff926ff55f2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff541635f8e6.pdfIn PDF document text
    • https://bakadowo.weebly.com/uploads/1/3/1/3/131380427/gikukabi_numekekikazore_noruti_wosoloruwupuvoj.pdfIn PDF document text
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/53a0fe35014b00e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_5fe8107267cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_601cbc7d3d3a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_601830cd865a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5fe9ec439f887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5fdb0f9ce1916.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beralopijabeziz.rf.gd/60539492136.pdfIn PDF document text
    • http://pazixurofuni.epizy.com/sofikigikisalivaxokor.pdfIn PDF document text
    • http://lagorov.rf.gd/12th_half_yearly_answer_key_2018_physics.pdfIn PDF document text
    • http://kiwozoma.epizy.com/81354259535.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/lojereronubo.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_off0000be89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE89 5400 bytes
SHA-256: b88cff74a6fe7080818167225b44bdd043c972c0e2af1f1aa9fe0cc7f6fea902
font_01_sfnt_off0000d0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D4 9920 bytes
SHA-256: 28ec67c6703825f7e9f950dc5b51f7f14180dd0b55b0571c352d4c929c196b21

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