Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2cf3c369b00b93d…

MALICIOUS

PDF

68.3 KB Created: 2020-11-25 19:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e94a384aa28d4f1680c47bc9149ae90f SHA-1: 10aa0effc5a08ffb9e8cdf50988651be227d7a68 SHA-256: b2cf3c369b00b93db4adae4b85851a09befb1bd9fb0f55377cfa44bb1623df87
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-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.
  • 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://trafftec.ru/strik?utm_term=san+felipe+baja+california+resorts PDF link annotation
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/5fac9d27.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/linabukoburamezexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_5fa04f515ba4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_5f97d5b9ee325.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/ce9cc4d.pdfIn PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/7c6b986526c.pdfIn PDF document text
    • https://keguvetazako.weebly.com/uploads/1/3/4/7/134702613/muduwotujirol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_5f91db3b0285e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f92517834985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_5fa5367b27d8b.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/a408ab4e-8593-4ded-800a-7a35a06584df/wizekejot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fc7cff-d91e-4b92-bdd5-f350c73a29f2/tulozer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e38462-b904-4cd0-aee5-dfd1003d891b/tijadatabidisudug.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_off0000cf52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF52 5328 bytes
SHA-256: 6089d4d954b5b9fe076f96cc06c0c205c7e83224d25d30de5c5c28fd473aa856
font_01_sfnt_off0000e17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17F 10316 bytes
SHA-256: bad887c88028be5ffcae5250e2abe22626ebac6d0b96a23574c30f5248a94468

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