Malicious PDF — malware analysis report

Static analysis result for SHA-256 a178aaca006bfd71…

MALICIOUS

PDF

77.9 KB Created: 2020-12-30 01:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 05fd40a9c29da0a2109c3d4f168528e2 SHA-1: 74745c6b465a7eb3fb427c403d01e2ee6062b93e SHA-256: a178aaca006bfd71c0c01d5ec24bfb413b6a15c2dfe8d7df7c3e6016e3b6d292
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains an embedded URL pointing to 'traffset.ru', which is likely used to redirect the user to a malicious site for phishing or further payload delivery. No scripts were extracted, but the PDF structure and embedded URI indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffset.ru/123?utm_term=tipo+de+muestras+para+covid PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5fbbffc06880c.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/gijbQ7w/pinball_arcade_museum_wisconsin_dells.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/aPjhQhj/asteroid_meaning_deutsch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_5fb028586f4a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365646/normal_5fdf91ae5452e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_5fbfefb01689a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fdd1bdc00085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475852/normal_5fe56b80f3435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_5fccdcea4f27b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f97c72da7e7d.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/rotowan/zapunikarow.pdfIn PDF document text
    • https://s3.amazonaws.com/nazezawovi/54893873843.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/12090623259.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/nowatilepegusinigevisoj.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_off0000f194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF194 5196 bytes
SHA-256: fbcc9de975bc916399cc2009bdd85502f38945258217093ab0307e6bf0e4389c
font_01_sfnt_off00010332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 11692 bytes
SHA-256: 1b6d518d37320f0d47f5541368535c1b23c432506cff66ab79e9d5097e69cb93