Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ca0b72e4c78176…

MALICIOUS

PDF

76.8 KB Created: 2020-11-24 21:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a7c9d6693b1658b0f6bb79ef7a1e2491 SHA-1: 7aa1f1e7e3e8bec0aa6f99cf80f327b4dcd68360 SHA-256: d5ca0b72e4c78176f5b3cb45b13f613cbcc60d448b5b6ac353d56f53ec9b2689
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a significant number of external links, with one prominent URL pointing to 'trafftec.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a potential attempt to disguise malicious activity as SEO content, leading users to external resources. No scripts were extracted, but the presence of embedded URLs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=sakon+and+ukon+x+reader+lemon PDF link annotation
    • https://dikoriwapajok.weebly.com/uploads/1/3/4/4/134447187/1313169.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/db751a07-373e-452c-951f-526ac6be2a24/bogitodafolineguxaxigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958ad928-4f27-4670-a641-cbd9001d032b/calories_3_oz_baked_pork_chop.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/48520165536.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/95322935588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/408e3604-3ece-4894-9dec-332ea8c2cf86/95140455021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe18b51-073a-4eda-b4d4-53b8ddbc48e5/tiloxojirinov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999c28fa-3610-4f6d-ab93-ee77f1e60be5/89704484859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3ee5d5-16e3-4680-a567-cc6b40606d18/47509023977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b634d7b8-b28d-4f41-8b8f-403f04663b12/dovaladubixivifev.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/zozaxu.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_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 5028 bytes
SHA-256: 0d96db44350fbe146a612213d97c60783e2711390449ccca837fca7eaed5fc14
font_01_sfnt_off00010246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10246 10936 bytes
SHA-256: 828fbdbc2732afb3b673b8c41e5f23b99b04248f76ba0e4b23668ae440d4b621

Open this report in the interactive analyzer, or submit your own file for analysis.