Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d10581d562655ec…

MALICIOUS

PDF

77.7 KB Created: 2020-12-30 05:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9831b61d4aeec976381341ea546ff445 SHA-1: 72192042e61b2d67e9e57c3eef9c6f53af22b977 SHA-256: 3d10581d562655ec6e95e5007b7f8d30479ec4ef158b07c8217a7c9fe5b8e6ad
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the document contains numerous external links, with one pointing to 'https://traffnew.ru/123?utm_term=pete+rose+baseball+card'. This suggests the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=pete+rose+baseball+card PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f8a3d4cc6556.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500200/normal_5fdfd3f360f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_5fa58fb5183f8.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/ledulejalaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sugowubuf/34494220762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e7ab36-4dad-4cf5-95ea-db1495594012/purixuzuz.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/kumareberamesoja.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/vudazerukozogusonavew.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/disclosure_of_minority_interest_in_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/food_costing_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/stick_rpg_unblocked_77.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/45558541077.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/grade_4_math_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 4708 bytes
SHA-256: ba3d08af9493f6922549f64fdfafb47f513e8f209aa6062cccbdfc1299570eb5
font_01_sfnt_off0000f988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 10136 bytes
SHA-256: 1039842035183a5ba7553901d321a1557c367971fa956d3e037ff84e62e8661c
font_02_sfnt_off00011c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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