Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3178ded9532860…

MALICIOUS

PDF

68.3 KB Created: 2021-01-10 00:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e173b3d5bfbd5239aced79981cf6d705 SHA-1: 20addb67bad54488142ef148404c6e5a0d301f96 SHA-256: ea3178ded9532860a8ed80d101e01d5f34c50905b5beee722b7d05b2bbf5022c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with a primary one pointing to 'traffnew.ru', suggesting it's designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm hosted on disposable domains, a common tactic for phishing and malware distribution.

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://traffnew.ru/aws?utm_term=astrazeneca+email+address+format+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fa025f3d4832.pdfIn PDF document text
    • https://rorujazikuje.weebly.com/uploads/1/3/1/3/131379225/b941305.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/zuliwivijaba.pdfIn PDF document text
    • https://wajevubal.weebly.com/uploads/1/3/4/6/134687537/fafetuvebono.pdfIn PDF document text
    • https://site-1197027.mozfiles.com/files/1197027/88295319680.pdfIn PDF document text
    • https://gutoserenenew.weebly.com/uploads/1/3/2/6/132681448/8556668.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/3623587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404959/normal_5fce6d1171487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469849/normal_5fa51431c11c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f97a45a598bd.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/2491377.pdfIn PDF document text
    • https://site-1174394.mozfiles.com/files/1174394/karawivurize.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/lepefi/social_media_marketing_journal_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/compex_electrode_placement_guide.pdfIn PDF document text
    • http://www.astrazeneca.comIn 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_off0000ccf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF6 5272 bytes
SHA-256: 7a049363831bc5af55c1f02fccacabe3ff01b97de2ee87c35c575315aee98068
font_01_sfnt_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 11184 bytes
SHA-256: 91f13a13d811cfd15863800bed7daf31dce1400fc57478ef80fc83792fb43321

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