Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cd61a335697030…

MALICIOUS

PDF

66.3 KB Created: 2021-02-12 21:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7d6eeb378257f3082923732fa649e4a6 SHA-1: ef0ea4fc45e2db9e4612ab7f1feabcfca62119c8 SHA-256: 56cd61a335697030c471d3172d2e74d232c73fa65e371fd2762807c578decc73
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://jacksth.ru/wix?keyword=ap+biology+guided+reading+chapter+25+answers PDF link annotation
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/jajemewilolesabuzito.pdfIn PDF document text
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/9105717.pdfIn PDF document text
    • https://bozuzagon.weebly.com/uploads/1/3/4/6/134666742/wufeza-detami.pdfIn PDF document text
    • https://pokifinib.weebly.com/uploads/1/3/4/0/134017941/9988057.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/948035c925.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/lumapodumusez.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/nimomimar.pdfIn PDF document text
    • https://xofisotojef.weebly.com/uploads/1/3/0/7/130739513/0e5e4f91788.pdfIn PDF document text
    • https://gizigega.weebly.com/uploads/1/3/3/9/133999267/406876.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/sikuborol.pdfIn PDF document text
    • https://safadere.weebly.com/uploads/1/3/4/0/134018032/tokusadugur_pefun_xofobosipisoti.pdfIn PDF document text
    • https://tixuguzuw.weebly.com/uploads/1/3/4/0/134096155/db10bd56b35.pdfIn PDF document text
    • https://bifugojatomawak.weebly.com/uploads/1/3/1/4/131437093/5752756.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/purawuma/zaritilux.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/latimejigavejij.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_off0000c80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80C 5916 bytes
SHA-256: 6785c3934e6aff5ae230fd9c0e883401c65c2309dd4204b64ef1c22e23b19245
font_01_sfnt_off0000dc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3D 9380 bytes
SHA-256: e2e32f499229c4b5cc382fb409af68981e1068ef0e4ed25e78d47e0f494e25e2

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