Malicious PDF — malware analysis report

Static analysis result for SHA-256 01214ea57ec0bfc5…

MALICIOUS

PDF

76.4 KB Created: 2021-01-11 14:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 488dc5ba3a25ec0d67bf1e5a71fe823b SHA-1: a2abbd314c01db86a9749f4e747f11305e1dd10b SHA-256: 01214ea57ec0bfc55c90631f3d8a192188b2d3567edeb9888e7c9c2cc20b7826
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic. ClamAV and ML classifiers identify this as a phishing or malicious PDF. The embedded URLs likely serve as lures to download further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://traffset.ru/123?utm_term=putt+putt+saves+the+zoo+wiki PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5ffbdd7ccea64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405185/normal_5fefa477854e4.pdfIn PDF document text
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/9135532.pdfIn PDF document text
    • https://cdn.sqhk.co/sezelijimofi/giyiiYg/mini_coloring_books_target.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413108/normal_5ffb0bea81269.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/1845407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481168/normal_5ff5be263ee35.pdfIn PDF document text
    • https://nivikaxixigimom.weebly.com/uploads/1/3/5/3/135322477/musajafox.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/viwoxuz/avs_video_editor_android_apk.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_off0000e14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 4824 bytes
SHA-256: bef1e7d21b654c8f1d8c0e53c673661b970ed96f205f4cc1cb5f4a52e43849be
font_01_sfnt_off0000f1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 10848 bytes
SHA-256: 694e6170e7830d420ea668605505a6f00a34558ad2dd178dd293acb662f0b3e9
font_02_sfnt_off00011701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11701 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3