Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1911e994135f152…

MALICIOUS

PDF

71.2 KB Created: 2021-01-07 21:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6e6741769bfd434aa8a679d445b805e0 SHA-1: ee984b127058f3366b202ffb589c0a4e8ec65907 SHA-256: c1911e994135f1528ba686729743a40f37aeea78f43338ea7bbcb513fc980058
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically pointing to 'https://gettraff.ru/aws?utm_term=cabal+online+ph+full+installer'. This URL is presented as a download for a 'cabal online ph full installer', suggesting a phishing or malware distribution lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://gettraff.ru/aws?utm_term=cabal+online+ph+full+installer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f87d54c76771.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/Ymhfujg/17295153337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_5fb530c009d8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f8c4e2b8afb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415951/normal_5fce41114df12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fc66ea4784da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f8c71a83e8a7.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/pezufatexo/django_reinhardt_songsterr.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/rr.com_webmail_log-_in.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/2010_child_tax_credit_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/cartogram_apk_mirror.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/37424387118.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/civilisation_1_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/borg_dyspnoea_scale.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_off0000d9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AB 5032 bytes
SHA-256: 8daf41122618c4874c1bb11f1b5c7f25f5bb737c75056cb9dfa0276c64173212
font_01_sfnt_off0000eaba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 10976 bytes
SHA-256: 6e0da995f385f4ab7a52e1d415e2d7ce30b1a18a4e870dd828fd98b15d20cc20

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