Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec019bfb05364667…

MALICIOUS

PDF

100.8 KB Created: 2020-12-30 17:10:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d0a1d8aa90c1e5665ccf2e238cd0e824 SHA-1: ea6916dfa9d73d87e3cb52f4a978374bfe1d260e SHA-256: ec019bfb05364667fe8467c4a544fc1532d337a0f5b10b274b4ff281c1441edd
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru', which is presented to the user as a download for a game mod. This indicates a phishing or malware distribution attempt. The PDF also contains a large number of external links, suggesting it's part of a link farm designed to improve search engine rankings for malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/wb?keyword=car%20parking%20multiplayer%20mod%20apk%20only In PDF document text
    • https://rebanurox.weebly.com/uploads/1/3/4/4/134490941/mewarapir.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwutiro/mjbahhZ/children_s_cross_coloring_pages.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489976/normal_5fe2396dd8424.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/kelevuwave-wuretowenesa-wolonowalotub.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/jhgges6/vukakogajeb.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/zeduxevomolewi.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/juvetaso/45020296863.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/96462105883.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/barbie_video_game_hero_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/59805196967.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014c51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14C51 31824 bytes
SHA-256: 50fe8984df70f6808e9c4d9f7a1280026c087d75a1a7ce5b9927bac249aa3c3c
font_00_sfnt_off000117eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EB 5172 bytes
SHA-256: def5521c469744d450e25ea1e41b63bba225ccc19c15064941745a1352d5b549
font_01_sfnt_off0001297c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297C 10080 bytes
SHA-256: 4c2432ca26abc0cc15520d47ac074f4905ba3bc8c70859801af209e809f2976e

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