Malicious PDF — malware analysis report

Static analysis result for SHA-256 409425263dce4cd0…

MALICIOUS

PDF

90.1 KB Created: 2020-12-26 23:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 94d352d12dd52388a04e2c98aa0214a9 SHA-1: 550435be971642105f9f5bbf8c57652121159146 SHA-256: 409425263dce4cd025c7109e05d5136a89daf06e7716508d1ec12eaf152e7bcc
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Plain journal bearing pdf'. The presence of an external URI and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=plain+journal+bearing+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392861/normal_5fb339b321d47.pdfIn PDF document text
    • https://cdn.sqhk.co/terexugureto/gjfihgd/9334566195.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444649/normal_5fcd7fd9c3d94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_5f9e3da111104.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/OidDijw/cool_star_wars_apps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445534/normal_5fcc2c94dfb9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410952/normal_5fa840cb3d2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_5fabdb8bd9598.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/9b4983d3-39f1-400c-adfc-cd478d71535d/15608485219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62134e56-55a4-4adb-8e0a-c1bc546cab75/doge_ascii_art.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/god_of_war_idunn_apple_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/pufuzuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gufedoviti.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_off00011d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D42 5248 bytes
SHA-256: 872aad607a3df75ef1435f6f8cc1dcdfdc15f9e65bfccb66498759db27810b40
font_01_sfnt_off00012f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F31 14224 bytes
SHA-256: 99a6c12fb64c671676983f13e8ce4a1be6a55b702c76c670eea3897647bcf464