Malicious PDF — malware analysis report

Static analysis result for SHA-256 172e6c929d31cde9…

MALICIOUS

PDF

66.6 KB Created: 2020-11-24 19:09:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 591e7443673d940682d9b0cadaaad67b SHA-1: 1e17c77813067dca42401ec7cb1cddcddb31bfea SHA-256: 172e6c929d31cde920caf65b49eb6ce3b05d6d28547662e20cddd923640d8501
156 Risk Score

Malware Insights

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

The file is a PDF containing a large number of external links, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to other sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=hum+saath+-+saath+hain
    • https://vaxedokumam.weebly.com/uploads/1/3/4/2/134266394/sifisunidawor-wubukagat.pdf
    • https://poxotedodesogin.weebly.com/uploads/1/3/4/3/134305686/fa0dcd928ac3274.pdf
    • https://badadivuzadan.weebly.com/uploads/1/3/4/5/134523039/vuwafesulos.pdf
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/pabopiwinidi.pdf
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8fb881cda0e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xutomoxu/75123084483.pdf
    • https://s3.amazonaws.com/voxulija/nekevuwegetaxonejezew.pdf
    • https://s3.amazonaws.com/jadere/persona_3_fes_quiz_answers.pdf
    • https://uploads.strikinglycdn.com/files/1a8e2066-d729-4cf6-8e05-c1d61261df28/kifebotijapilaj.pdf
    • https://s3.amazonaws.com/sebunuzu/tapujujazo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca00.bin
2742f388b6fc97edfea32293d7a61e763bd7c4b70490ce0975abfb83cb7d5471		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA00 4788 bytes
font_01_sfnt_off0000da24.bin
af16a3d884736957b44192b9edeb697c9c7ca29262a670925d9e3b4cd230c41a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA24 10608 bytes

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