Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a9f09b242261b8…

MALICIOUS

PDF

84.0 KB Created: 2021-03-06 10:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e8c7627e15d2680d73df92ebc8ec4dff SHA-1: 6d3a0dedca46865779d9ce3fb235caa9166841f7 SHA-256: e6a9f09b242261b8f591120f05dbe06f17b7a030ad733745be1d1c9e691cae09
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest an attempt to distribute further malicious content or phish for information.

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 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.
  • 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://jumiwimov.ru/wb?keyword=josephine%20tey PDF link annotation
    • https://cdn.sqhk.co/dewufidabo/oSbidOC/tixopavaxixezunasiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_5fe7903bc519b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_6013bb92c816b.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/KRSqjgf/ravenhill_hidden_mystery_match-_3_with_a_story.pdfIn PDF document text
    • https://merasewutid.weebly.com/uploads/1/3/4/3/134348660/11b02792f896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481665/normal_6040b2c60ed9d.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/KJ8nljb/city_of_houston_warrants_check.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_601448679fbed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_601425959d6d7.pdfIn PDF document text
    • https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/de8f1880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457881/normal_602e34a7d14fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fc97916e2654.pdfIn PDF document text
    • https://cdn.sqhk.co/salijuvam/cge8Nhc/slenderman_pick_me_up_costume.pdfIn PDF document text
    • https://cdn.sqhk.co/rorexamuviz/3AAihSa/can_you_escape_adventure_level_15_walkthrough.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_601e0c73ed52f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370078/normal_6002100c872b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_603bf357f1502.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ea8b2e-f7cd-482e-abc2-cc3fbbb8d538/30109869046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea198f03-3ac6-4bd9-979f-a9167d0ece8f/1349480832.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 5844 bytes
SHA-256: eb164b1f31fb0cc01b3d7eeacf9c93bfdd423e8fd8f8672282e5e2b37e3a192e
font_01_sfnt_off00011e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E63 10440 bytes
SHA-256: 6bfee2cca6f1378ae2e600e944d8d0aa78c2d182af1bc892de52787f038e50ff

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