Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdaec56a1633b13e…

MALICIOUS

PDF

59.9 KB Created: 2020-11-10 23:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fa25dca583110d657a5ef86cd5bac910 SHA-1: c1a5fe1575c4b089a39a5cf2f293b11755c8fbc9 SHA-256: fdaec56a1633b13e469f37e69bf3e524890a79461c56311f1b55519bff4ddd43
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or redirection mechanism. One of the embedded URLs, 'https://trafficel.ru/123?keyword=monkey+king+pub+and+grub+menu', is suspicious and likely used for phishing or to host a malicious payload. The document body appears to be obfuscated or corrupted, but the presence of PDF-specific heuristics and the overall structure point towards a malicious document, potentially using JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/123?keyword=monkey+king+pub+and+grub+menu PDF link annotation
    • https://gutawiwexuzoti.weebly.com/uploads/1/3/4/4/134477232/zetamabofiwaku_tenewele_bifaj_nemewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5fa5d1a0710ae.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/desodoxefawasexa.pdfIn PDF document text
    • https://mazofowi.weebly.com/uploads/1/3/4/3/134312703/79549b.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/f8eec03a-285d-42e2-9939-68ee8607997f/biografia_de_evangelista_torricelli_y_blaise_pascal.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/41240226621.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/mountain_river_handicraft_incense_holder_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b5fb02-2ca2-4d85-afa5-073e0d9af3fe/dobosoxubepep.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/blade_of_conquest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/download_wsop_free_poker_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415f4849-e5cd-4330-872a-70b195967415/26565390859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c60a216-929a-4ee6-9e78-624ecae7865c/bawexosazi.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_off0000acef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACEF 5380 bytes
SHA-256: 129ccaff540798e6b39e1565603cff22f832fc443e5146010d0220276010c41c
font_01_sfnt_off0000bf3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3C 10556 bytes
SHA-256: 59fd6e6e29156a2a9353e7a4e928a9d19f75ed87c72a20e10117113048581354

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