Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9d629f57d1f4a5…

MALICIOUS

PDF

59.3 KB Created: 2021-01-17 00:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b9ba0f503ef672d27a730913e40db057 SHA-1: ea657acbf6600333c8834728017738cab077b5ac SHA-256: dd9d629f57d1f4a58dc57afc354e6bad4d3b1b987d1198602d2af5af5a60699c
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, with ClamAV identifying it as a phishing trojan. The PDF contains a large number of external links, suggesting a link farm or a distribution point for further malicious content. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics indicate an attempt to redirect users to potentially harmful sites.

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://trafffe.ru/123?utm_term=renaissance+siege+weapons PDF link annotation
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/3032914.pdfIn PDF document text
    • https://site-1172792.mozfiles.com/files/1172792/bartender_guide_recipes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420237/normal_5f9ed323158b8.pdfIn PDF document text
    • https://site-1171105.mozfiles.com/files/1171105/xtreme_freestyle_2_apk.pdfIn PDF document text
    • https://site-1166626.mozfiles.com/files/1166626/zonisefijomenige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407781/normal_5fc72bed5c140.pdfIn PDF document text
    • https://site-1168175.mozfiles.com/files/1168175/cross_linked_polyethylene_foam_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380694/normal_5fce0df7c4920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_5fa3cfd248a7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5fa7bcba6a962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490542/normal_5fd0e6378b97b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ada4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA4 5072 bytes
SHA-256: 9c04ecdfbaec3cee90827de5fe8e92ca4072b4e5cebe6cb86546b3d4dd139588
font_01_sfnt_off0000bf18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF18 9844 bytes
SHA-256: c468a46013ae493807df7af9edad8934ee8d7432fd7b7a8ed1086cdfb5907e40

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