Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb20b681029c828e…

MALICIOUS

PDF

72.3 KB Created: 2020-12-28 01:25:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4f5d8ec316e20a2d753342c3a8807867 SHA-1: 2ce1dc05b67f79d7a4dfb5f237ffc3d8a1f96f81 SHA-256: eb20b681029c828e1996e5360e2a2549ef98932e01e396b0d59cbf1a0cbc46f6
164 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, with a critical heuristic identifying a link farm designed to host multiple PDF files. One of the extracted URLs, 'https://trafffi.ru/strik?utm_term=five+below+stores+in+ohio', suggests a lure related to local store information. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/strik?utm_term=five+below+stores+in+ohio PDF link annotation
    • https://cdn.sqhk.co/reretukida/3Pjbhh3/potamipuzut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_5fa8e44d2749b.pdfIn PDF document text
    • https://wanujonoguj.weebly.com/uploads/1/3/1/6/131607110/1207457.pdfIn PDF document text
    • https://cdn.sqhk.co/sanozusu/dCioiee/fish_tank_stores_near_me.pdfIn PDF document text
    • https://lurovexizapup.weebly.com/uploads/1/3/4/4/134402553/5277042.pdfIn PDF document text
    • https://vutuzanepe.weebly.com/uploads/1/3/1/4/131453188/2184517.pdfIn PDF document text
    • https://pisefipekopaz.weebly.com/uploads/1/3/4/4/134461515/kegoligalilajit_jexuvojujibixun.pdfIn PDF document text
    • https://wegujelad.weebly.com/uploads/1/3/0/8/130813898/5228539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f8723528b9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451762/normal_5fb6e9ff01538.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/nuxepiduded/vojajimogoneralapajuxubul.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/tipepefenedizux.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/architect_cv_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/65005972784.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE1 4808 bytes
SHA-256: 80ce6d8343ff9e38fcd4006b25dd7954700d363100209e558a2bb6d3bdda2f8a
font_01_sfnt_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 11560 bytes
SHA-256: a9e740719408896bc2f37469bd3048ce9dad7b813991c8a02b58ebc874a7bab3

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