Malicious PDF — malware analysis report

Static analysis result for SHA-256 3570a3dd1a2cd0bf…

MALICIOUS

PDF

74.4 KB Created: 2020-12-25 14:32:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e0c946fdd4a9825e76b063dc6daf5d3f SHA-1: 8fae308f5171543de19a7fc1e9c7eb585a2556b3 SHA-256: 3570a3dd1a2cd0bf74de589f721d83444d6b5eb05bc107f0569b7c61759206db
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=run+hulu+trailer PDF link annotation
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/zajedan.pdfIn PDF document text
    • https://nimefoxigobaki.weebly.com/uploads/1/3/4/8/134847293/vexatupilorene.pdfIn PDF document text
    • https://cdn.sqhk.co/zifakepavax/N6Eibih/pokimibe.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/hbnR3FD/zadar.pdfIn PDF document text
    • https://julupovopanar.weebly.com/uploads/1/3/4/7/134732987/2421550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_5fb265808e8fa.pdfIn PDF document text
    • https://cdn.sqhk.co/kakumipoman/hm8ujfq/11152252397.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/2heKMhc/labyrinth_game_ravensburger.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/2d093194-fc63-4cb1-bdeb-4667579d3d8d/xbox_360_sorry_there_was_a_problem_code_80072ef3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f14bd9-bd0a-44ae-8442-7f66063941ea/48_godly_character_qualities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba699b02-61da-49b2-a5f4-03248863db52/dakasepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6562927-bdb7-407c-a08a-d58d574f933b/sibemi.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_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 4604 bytes
SHA-256: 5d29db64fd1a522a55b22778cbcd73812a1cb4ed7c60f1b4e6e872b805af8a0f
font_01_sfnt_off0000f687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF687 11688 bytes
SHA-256: fcbc53ec12229da38a00e8601cd20eec55a992c321210bf5a34dd6195b8b552c