Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26bd9f69b96dca9…

MALICIOUS

PDF

73.1 KB Created: 2021-03-18 22:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7e3eb7f211709c6d5e789963f0755823 SHA-1: 3f596d4a532f2f336b59be45b667a9423290b6e7 SHA-256: b26bd9f69b96dca9f330366d47035faf4842fd2686af1313ccfaeaa6884b8817
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing lure. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites. The heuristic 'SE_MFA_LURE' indicates the document likely attempts to harvest credentials or abuse multi-factor authentication, a common tactic for phishing.

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/123?utm_term=imo+free+video+calling+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496826/normal_5fdc149e46f2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406223/normal_5ff42d989853b.pdfIn PDF document text
    • https://cdn.sqhk.co/wisewuguv/Gcie5Q2/chicken_run_cast.pdfIn PDF document text
    • https://sifapovidajep.weebly.com/uploads/1/3/0/7/130738911/gopajegarugusip.pdfIn PDF document text
    • http://podarokinsta24.online/tosekaxumtns.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/iicYNsM/43897272833.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/ijecify/test_drive_unlimited_gold_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolegu/gecjidL/rush_rally_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417414/normal_5fe0484c3ba2e.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/Ugiiihi/54928823204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381973/normal_5ff7fc8e5c58c.pdfIn PDF document text
    • http://paktum.pro/dusk_till_dawn_meaning_in_telugusz4gk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421461/normal_60346b5ff2d1f.pdfIn PDF document text
    • http://siteznakomstv69.space/monocotyledon_and_dicotyledon_plantsjznb8.pdfIn PDF document text
    • http://ecoservice-vlad.ru/29455622676r2nkl.pdfIn PDF document text
    • https://roxasudafuj.weebly.com/uploads/1/3/0/7/130740166/772b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407664/normal_6011c2e2004c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_85aaf6177758469e92064c9d6c9f43c9.pdf?index=trueIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_4c5bae2d14e94ffbb9bfbf99bb99b0f2.pdf?index=trueIn 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_off0000d7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E0 5296 bytes
SHA-256: 18b76f040828596d8baf8659cec908701396088e51707954c3578fc489fe52ac
font_01_sfnt_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 14636 bytes
SHA-256: d3e79c61d61e6dc926606332e18225aebe2266362f3b51eaaec69d3ae4fba716

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