Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dabde075a21ad70…

MALICIOUS

PDF

75.1 KB Created: 2020-12-30 04:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f6a370e2a372f6e34b6e58c8867e3239 SHA-1: 22f98537e14bf50ce2c5cb65799b24d2d7088f64 SHA-256: 3dabde075a21ad707e395c983284bfe108bcc2c2fb072039f9cee8cef3a56b35
156 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://trafffe.ru/123?utm_term=rocky+mountain+radar+the+judge', is directly embedded and likely leads to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=rocky+mountain+radar+the+judge PDF link annotation
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sorivojobenejuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8b5d926eaf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5fc70224593b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5fe32d9541f2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495536/normal_5fe5635b1ea70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5fa000525cf2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5fe332bd71661.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/8082115.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/3578596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480402/normal_5fb519c3a8094.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/bupaxomu/core_java_basic_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/basuralutux.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_off0000d9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E7 5272 bytes
SHA-256: 7b25a3f92da330874ce5767b63060196ba8bbaf7a1a454245abe9d27b2a62a10
font_01_sfnt_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 11156 bytes
SHA-256: ce565ccc5951961b54498a6fc477aa5d63a5d7653851d57cca1fcb13ec8d5cd3
font_02_sfnt_off000111e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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