Malicious PDF — malware analysis report

Static analysis result for SHA-256 466433d6bfd899a6…

MALICIOUS

PDF

71.4 KB Created: 2020-12-27 06:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c48c65a13a3ba94804fb3c8fce2d47c SHA-1: 75ac55c91a94f1d0d80be22ae07eccf7254abafd SHA-256: 466433d6bfd899a60c3584f34acd9eebf6c6dc6aa062a4aedf9f6f19a7457cb2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to benign-looking PDF documents, but one key URL points to a suspicious domain. This suggests a link farm or phishing attempt designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=skins+sonic+dash+minecraft%2528+unofficial+download
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/912804a19a36f66.pdf
    • https://cdn.sqhk.co/zupuguvawaj/6hbjf4r/62757632354.pdf
    • https://nizozunolo.weebly.com/uploads/1/3/4/3/134396810/wivijum.pdf
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/lezawapijisexun.pdf
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/4719745.pdf
    • https://xitonodulamet.weebly.com/uploads/1/3/4/3/134307836/59c7b37.pdf
    • https://xizodekez.weebly.com/uploads/1/3/4/7/134769153/81341.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a3a81191-8c01-4ce4-8246-049ae5d1a60d/31105993469.pdf
    • https://s3.amazonaws.com/figugipopar/college_algebra_problems_with_solutions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/6a7c1868-1d66-4f12-8e7b-c018ee7e683c/6457820833.pdf
    • https://uploads.strikinglycdn.com/files/e9d4b992-dbfa-4f3d-b5eb-81807e0d938b/business_objects_query_builder_guide.pdf
    • https://uploads.strikinglycdn.com/files/3771a8bc-30cb-4a11-8c94-e5d2c0a228ed/degelubuxevagomekige.pdf
    • https://uploads.strikinglycdn.com/files/fe2f3dc2-d4f0-4023-a77d-876d7b4c8aeb/nominal_data_sets.pdf
    • https://s3.amazonaws.com/xelimewat/list_of_ford_check_engine_codes.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_off0000da7a.bin
c34888a889b76722d24b03ea0ef000f68c728ade797dde9d0ff4efee54566d75
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 5600 bytes
font_01_sfnt_off0000ed7a.bin
c588f0fb4e7fb9c85f457342a326d50e8420b6ee80be7d9994e182ff4d94ca9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xED7A 10184 bytes