Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d678ab4ccf5939f…

MALICIOUS

PDF

71.4 KB Created: 2021-01-11 10:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 694645a317c1b43b7af65e0448ebef66 SHA-1: 7ce0841fd674c661b83d36a2e607f42bbf901f9c SHA-256: 5d678ab4ccf5939f8f99e27c67d50b45dd67215254dd8b901921460ad0cdd117
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URI pointing to 'trafftec.ru/aws?utm_term=media+player+classic+full+crack', suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing campaigns designed to trick users into downloading malicious content or visiting fraudulent websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=media+player+classic+full+crack PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393515/normal_5ff55b21cfde5.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/furufoge_vosetakox_juxiw_fanisivozaf.pdfIn PDF document text
    • https://diwoxine.weebly.com/uploads/1/3/1/8/131872021/5812025.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/k7mgchj/71325892787.pdfIn PDF document text
    • https://denimuka.weebly.com/uploads/1/3/4/5/134582609/a7c85c.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/lomiwexuva/review_cell_organelles_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/maths_genie_recurring_decimals_to_fractions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/desu_desu_desu.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/jagotopopifepesobuvosavut.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_off0000d2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B0 5320 bytes
SHA-256: 85e572051cb88b8967694d41c882438d23d09d689f796d3f512f2536117ecc01
font_01_sfnt_off0000e4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EF 17380 bytes
SHA-256: 49bf4e5967a66215bbdc9017c776c83288b80f7ff178f317501e14f2c5ece109