Malicious PDF — malware analysis report

Static analysis result for SHA-256 67dc564db5214daf…

MALICIOUS

PDF

81.5 KB Created: 2021-06-04 13:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 27be3328ab9eb1118bd662dc50f3c274 SHA-1: 50219367585c74c882cd354c59454ed24e8cf645 SHA-256: 67dc564db5214daf850c0fe7dcb22ae40789b40a610bab6818bf55a979981dd2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is heavily laden with external links, indicating a link farm designed to redirect users to potentially malicious websites. The presence of numerous Weebly-hosted PDF files suggests an attempt to obscure the final destination. ClamAV and ML classifiers also flagged this file as malicious, likely due to its structure and embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=asos+womens+shoes+size+guide PDF link annotation
    • https://wovuwujofisup.weebly.com/uploads/1/3/1/8/131856276/kufuge_gizeni_futuvonunuzex.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/sukawanomatokulamida.pdfIn PDF document text
    • https://jetufebarivoma.weebly.com/uploads/1/3/4/7/134703916/fajobusalevu-rejiziwonuraviw-xonekiselebat-gaxinugir.pdfIn PDF document text
    • https://gokokunebede.weebly.com/uploads/1/3/0/8/130874183/00f7d.pdfIn PDF document text
    • https://puxokobipo.weebly.com/uploads/1/3/4/5/134524361/438855197ea.pdfIn PDF document text
    • https://valefeka.weebly.com/uploads/1/3/5/3/135345526/7d8cf.pdfIn PDF document text
    • https://sasugitakog.weebly.com/uploads/1/3/4/6/134651708/e67bd7.pdfIn PDF document text
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/7154651.pdfIn PDF document text
    • https://pemimitajeli.weebly.com/uploads/1/3/0/7/130739011/8107882.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/podidesol.pdfIn PDF document text
    • https://mivebomuponi.weebly.com/uploads/1/3/1/3/131398008/6603049.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/4813008.pdfIn PDF document text
    • https://ximabetewu.weebly.com/uploads/1/3/1/3/131384229/morat-lujumivex-mixemolal-nasowuvisexo.pdfIn PDF document text
    • https://bederoka.weebly.com/uploads/1/3/4/8/134886295/b19a3502d3a4e51.pdfIn PDF document text
    • https://viforiler.weebly.com/uploads/1/3/0/8/130874197/tarutituvasiromug.pdfIn PDF document text
    • https://jofukesor.weebly.com/uploads/1/3/3/9/133999831/942c004ed.pdfIn PDF document text
    • https://gapidekejoz.weebly.com/uploads/1/3/4/8/134876705/9481920.pdfIn PDF document text
    • https://ruwaxejitoxa.weebly.com/uploads/1/3/4/9/134902813/f127db020af49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470218/normal_60066991a2de7.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/xolet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_6062d04312c78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 5032 bytes
SHA-256: 7c0b0eeecd9210ae26836c141eb694dbfb4778b31dd2abf1234b6e1cbc5397cd
font_01_sfnt_off00010fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC0 12060 bytes
SHA-256: 1b36c7fc389f49a5d506c52fbc260543c04790e302c0794ac25439e941680905

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