Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b00049ba7aabed…

MALICIOUS

PDF

65.2 KB Created: 2020-11-10 22:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbf1eac8b239e7efae4c1262e82be66 SHA-1: 1a0e04630f7766e68cd8458635ca72008af58230 SHA-256: 72b00049ba7aabedf44f5f8dc5c448a2ffae8a129af6ee8c6e29fcc939de1002
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://traffnew.ru/123?keyword=tcc+advising+phone+number', is likely part of a phishing or scam operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?keyword=tcc+advising+phone+number
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/vupuxaxawoxelap-nafaxujes.pdf
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/moferaju.pdf
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fa8512b5dd70.pdf
    • https://cdn-cms.f-static.net/uploads/4425915/normal_5f9f9e143ec32.pdf
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/f5484b52f95ccda.pdf
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8c71a5d9611.pdf
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/zanivave.pdf
    • https://cdn-cms.f-static.net/uploads/4413713/normal_5fa1ff00744b0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pibabopuduj/1930485959.pdf
    • https://s3.amazonaws.com/jiwisigetizoxif/28619023888.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3cd.bin
62a79ccc8ee9cd0e94646e82611bf9dc39cc1b3b11778f9c00a04411eaa89307		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CD 5604 bytes
font_01_sfnt_off0000d6b2.bin
f19fe3c16e528ecc1c79ea2cb18afeb522ea14f5a8c93d290ded511e3778d5bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 9944 bytes

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