Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1c0b1ca726576c…

MALICIOUS

PDF

60.2 KB Created: 2020-12-09 16:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2821c095970b08c24025f68ff549980c SHA-1: f95499f461d94f28018d6204c2d4804ef7256b71 SHA-256: 9a1c0b1ca726576c6950979088ffe74f5a838bd15b6cf5de0427b0bb7fc10462
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to potentially malicious domains, including 'trafffe.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'ultimate summoner icons league', suggesting a phishing or scam attempt. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=ultimate+summoner+icons+league PDF link annotation
    • https://muxalogedidu.weebly.com/uploads/1/3/4/3/134358485/cdd1bd69.pdfIn PDF document text
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/1285a2792.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/algebraic_function_machines_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gupisi/xosimigeriloxisot.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/6639875272.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc535882e34347c706079c8/t/5fcce1d38a55f2188b774876/1607262676470/dental_assistant_jobs_near_me_no_experience.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50452abaecd33183ca365/t/5fcd63a3f94b6402b22ce52a/1607295916910/77101406271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ca73b2-bcd7-4d59-9162-fdf7f2bb5911/9826713109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/302c207f-8a59-4aa7-8db6-61d20c6d1ba4/85981908484.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc557ce12facd59ceca82d9/t/5fcd2b352bc7884852bdd816/1607281461853/25868468799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6471986-640e-4ac5-8dc8-d56cd051ffff/behringer_ultracurve_pro_deq2496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16571949-6304-4856-a260-7436dd981d32/kinopikukajal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf80e39-2089-41cc-96b2-49deb4c843a9/gimujidomirodama.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/myopenmath_answer_key_college_algebra.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_off0000af34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF34 5108 bytes
SHA-256: 12972d4b284d2a19142ff32f2b0c47fb8ffdc8e51d34231aa013b54bb2d21c3d
font_01_sfnt_off0000c078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC078 10388 bytes
SHA-256: ee1c76a7ba4878ba86cfb9d29c01acab6963a043fb527a7e9ffb2dc88ce7b242

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