Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0faffb878a4346…

MALICIOUS

PDF

72.3 KB Created: 2020-12-24 21:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 79a9e1bcbbcdf2e12cb4758fac2891b0 SHA-1: e8680ec3e431ef105f4c4fbf526d87e6946b7597 SHA-256: 6a0faffb878a4346434c0e8225472dbb8fce10c1fced97b50b89b0279a38315c
154 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 'https://cctraff.ru/aws?utm_term=high+blood+cholesterol+treatment+guidelines'. This URL is likely used to redirect the user to a phishing site or to download a secondary payload. The ML classifier also flagged this PDF with a high probability of being malicious. No scripts were extracted, but the presence of a malicious URL in a PDF document strongly suggests a phishing or malware delivery attempt.

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://cctraff.ru/aws?utm_term=high+blood+cholesterol+treatment+guidelines In PDF document text
    • https://cdn.sqhk.co/bufutoje/geVFeo1/world_war_z_2_game_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwibagula/WgdTkij/degafukedegavibego.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/fadunatev.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/1816054.pdfIn PDF document text
    • https://weragekebikibu.weebly.com/uploads/1/3/4/6/134670115/zikowolozumediraki.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/f65b678e-1440-4500-86e5-62233cd3d01c/metolopisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f6762f-1203-4548-a312-816866e15e94/xuwijafekiwenij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b76b73c-41f7-46ea-b91c-51b6a6f75906/bisous_damour_pour_whatsapp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0774bc27-8636-4b16-a45d-f3250f2d8fe4/medalesogufufinodoremi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1764c8c1-9b3e-4d91-9a43-89879bffb320/sphinx_assassins_creed_odyssey.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/manual_calcareadeira_baldan_6000.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_off0000dd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD34 5456 bytes
SHA-256: 8db3c8f70c9833f371d4f8da786374eca7c44cacf5120aba459b1dc150066f43
font_01_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 10668 bytes
SHA-256: 8004e75e19953704304de48153c5b925b4cfe731951fe970099480d39a336f85

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