Malicious PDF — malware analysis report

Static analysis result for SHA-256 00dcc6cc01c0c66f…

MALICIOUS

PDF

76.8 KB Created: 2021-02-18 20:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f8fed0a5215ee9874dc708304058ee80 SHA-1: bf0208df75ce517e047a73f2f092e7c758b84b37 SHA-256: 00dcc6cc01c0c66fb6bbba78da81b25907a74f0b16b3351f40661279d9bdff73
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

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://druttle.ru/strik?utm_term=coptic+bible+verses PDF link annotation
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/3188686.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/medig-xamam-worenalifuba.pdfIn PDF document text
    • https://fatatarulawug.weebly.com/uploads/1/3/4/4/134474158/rewofebaginozimomur.pdfIn PDF document text
    • https://wozibasibif.weebly.com/uploads/1/3/4/8/134868806/5597475.pdfIn PDF document text
    • https://cdn.sqhk.co/fufejapopunu/ja7jh3D/nanobikibapagotowerofasad.pdfIn PDF document text
    • https://xotizirew.weebly.com/uploads/1/3/1/8/131855992/lefim_dikag_nalulaguxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451212/normal_5fddd36911e61.pdfIn PDF document text
    • https://bebedukiraf.weebly.com/uploads/1/3/4/8/134885496/c364861ffd465d6.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/puluselipefopa-sizag-vugafuxamumav.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/tajeOjc/xipowegexaluzavuru.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/ajdib9S/78501957887.pdfIn PDF document text
    • http://kmplitka.shop/732327210356d6rj.pdfIn PDF document text
    • http://clientesdkb.com/algebraic_expression_tutorialr61pl.pdfIn PDF document text
    • http://cardioactiveitalia.site/593171802911dsdl.pdfIn PDF document text
    • https://tupumerar.weebly.com/uploads/1/3/2/6/132695397/fepegovuzabim.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_off0000f0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0ED 4824 bytes
SHA-256: ac9ab6af29f8ef4c305d60c4cf72c61c73480ff7f051a875d2c29c40f449be9f
font_01_sfnt_off00010163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10163 10680 bytes
SHA-256: 6408b7810e0b4c5887f86d078b79b0ac3c774fb60a3b9737b0545e4713193c06

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