Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0652884b3ca9f5…

MALICIOUS

PDF

60.7 KB Created: 2020-11-16 22:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6257ffe95ba40232480fa1ffcade2a31 SHA-1: e995356c6eddab72bc15a04266609af2b665e291 SHA-256: 8d0652884b3ca9f542be827103606c47749fe682ccbfb88a3e1991700ec6ed17
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and phishing lures, with one prominent URL pointing to 'trafffi.ru'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/123?utm_term=maya+cinemas+salinas+salinas+ca
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/0c9d1.pdf
    • https://fokomowopijav.weebly.com/uploads/1/3/4/6/134643156/kajelixaji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3144f478-b8b7-4490-9d81-977b8dd53aa6/30515510729.pdf
    • https://uploads.strikinglycdn.com/files/fd58327d-bb86-4ae8-b174-9adead4065ff/fosters_home_for_imaginary_friends_episodes.pdf
    • https://uploads.strikinglycdn.com/files/87cff396-620b-4b51-ad9a-9a11034e5625/gurps_basic_set_deluxe_edition.pdf
    • https://uploads.strikinglycdn.com/files/157bbff3-d5b0-49b7-a9c1-e675ddee17ec/outlast_trophy_guide.pdf
    • https://uploads.strikinglycdn.com/files/81830ad4-a823-4b2d-95e6-902bb216d12f/graph_of_tan.pdf
    • https://uploads.strikinglycdn.com/files/1a2a9bec-535a-4bdb-b208-6c56f5bf4a56/algebra_2_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/a6a4d418-3a59-4a68-833d-745a894f5919/big_wheel_tricycle_for_adults.pdf
    • https://uploads.strikinglycdn.com/files/d1ac5dc7-0c2f-4833-b462-178809b56d96/spinning_instructor_manual.pdf
    • https://uploads.strikinglycdn.com/files/47730d26-e756-460c-b688-bc56f13d645e/49684415125.pdf
    • https://uploads.strikinglycdn.com/files/5a443ea2-008a-4046-ad72-de5fabe92418/25995328434.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_off0000b07c.bin
3322682b3427a2b5782a16a5c57ae5b55483e4abe609ae969b8eec0ab20306e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB07C 4956 bytes
font_01_sfnt_off0000c160.bin
6f1d9787e11737d0927a62951e817e91cb62cab7467fcc8e9bfdf54408c2ce73
pdf-font-stream PDF embedded font (sfnt) at offset 0xC160 10908 bytes