Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be1b00cff601670…

MALICIOUS

PDF

81.6 KB Created: 2021-03-24 04:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f1a5ec4a8b52df992932c27c50c944d6 SHA-1: 2e4ccc0502607e19dc545e22206524c2a8d17731 SHA-256: 0be1b00cff601670c78bb477d656668d36d542558627499a3ad9a6a06187565f
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 0.9998

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://nipisod.ru/strik?utm_term=duromax+generator+xp4850eh PDF link annotation
    • https://cdn.sqhk.co/fololekumi/ggi8ib3/piano_band_dj_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_6001423693b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5fd20282b217e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_6055f7a22975a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_6023e8d12eaa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402712/normal_6034c7c98c213.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382197/normal_5fe395117472b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452157/normal_6024996eefc1f.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_60596e48ad988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486537/normal_601f3d835d99f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_452f7ff7294547bbabee89e313e07c6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizedumi/android_studio_build_apk_file_path.pdfIn PDF document text
    • https://beca70af-11ea-46d2-a649-d7fd44c468ee.filesusr.com/ugd/dd41e2_cdc5c1affadc4bf3a3c5877de81cbfcc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/porakudonofawimeseruxi.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/un_curso_de_milagros_leccion_42.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_0c471512dc8a4e04920896bc317f6a92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pobixedele/tivikojulazijunegexikexes.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/21097372797.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_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 5636 bytes
SHA-256: 19c2e8179636419f0f39c07c562ccd4991219abe04096fcd4d6b9b7dc1d5b5ff
font_01_sfnt_off000113c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 10816 bytes
SHA-256: d164ce28716c1e0181cb3c74d1dd0f4f22be99458a9fe3b294584c2fa94289f0

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