Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a352483c268362f…

MALICIOUS

PDF

71.3 KB Created: 2020-12-02 00:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1e97bd7fe4f1c97a78d9afbe762158b6 SHA-1: dfe51d85eff6d90e476ded3fc8bfe326009cc57f SHA-256: 5a352483c268362fe9c0536261e02195e6520842c2b9d71d2e6468fb7ed46f61
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=bdo+berserker+skill+guide+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5fc270f257055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446649/normal_5fb4bec316b59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_5fb4e4514d117.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/bevani.pdfIn PDF document text
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/remupapekinaxibupu.pdfIn PDF document text
    • https://wikamarelifegef.weebly.com/uploads/1/3/4/3/134380256/vovijezej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f0de5bcb0228a282afe8/t/5fc170774f9837572015e878/1606512766355/peq_15_technical_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a1fc2cf09257bd77158e/t/5fc69afafa04221c71080cb0/1606851323781/40512623123.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3bf9f2e34347c70560205/t/5fc6be13b7521d608a2d9597/1606860309538/jurassic_craft_1._12._2_tutorial.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0b653fdc31513a119be7/1606224742313/terojetuzuzatujezasem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc378082bbd74065816d6b5/t/5fc6bdbf4f9413233b09ab3b/1606860223296/moto_360_camera_app.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A3 5556 bytes
SHA-256: 417c5ae44786f4d622ce02d78648686d0b2833e2c5401665aed6c3a3b9641459
font_01_sfnt_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 10288 bytes
SHA-256: 6ad0e891ccb58dfabbab032bfa8e2b816367e098c6b2d8efcd234a88db7acc65
font_02_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 16340 bytes
SHA-256: 4f9bddd8120402856594b33adaeac6aa436e26f5eb63b748bf1666df64cd7ce8

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