Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f72e3a31cb6eeb…

MALICIOUS

PDF

71.4 KB Created: 2020-12-27 01:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f99557f241731a48bf78bf0d6ad31ac7 SHA-1: c644e0247d876b99c721d41245b148cb324c4cca SHA-256: 34f72e3a31cb6eeb90cd6bc2042398b9fb3074d44517dfd835a16b5dad87a55c
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain text related to a technical search query, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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=search+in+rotated+sorted+array+leetcode PDF link annotation
    • https://cdn.sqhk.co/pixisuja/pgfjajf/gakumegita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5fd60d017456d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5f941b130fa36.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/waxapoz/84371149473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5cfaec3-c216-48fd-b629-fd0593613f92/98939956377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7acf92e-345c-47db-a371-1f9782cafd36/teradojurarurimefopis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df3c9157-d06a-4b9e-ba43-349e4a6532c3/peer_groups_are_important_to_adolescents_because.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ceaa875-6a82-4423-9469-56f9e18c7ea4/vodlocker_the_last_witch_hunter.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/libreoffice_spreadsheet_vlookup.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/booklet_creator_full_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d0bcaef-f3ef-48dc-bbdb-ae050e6e2aae/gavizuxam.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/40355519268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bcfab6-3d64-40ee-83b2-030dc0bbeb71/nibeniwizot.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/wabosilujekigupaz.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_off0000cff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF6 5232 bytes
SHA-256: 82e574776a35b7d780cf40ef52e3e6b2c24316fdc657b8364963a9ad07e0e49b
font_01_sfnt_off0000e1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BE 14312 bytes
SHA-256: d7453f32ec1fa2d82417fb63d1ca58b6c9fe2e0db5691d45a16feeebdc4a766c

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