Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4ce9083af69d37…

MALICIOUS

PDF

60.8 KB Created: 2020-11-24 13:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8096ad4c210af8c44495d8b8d80a0c63 SHA-1: bbd493512f368df46e69390ebcba73b81acc4099 SHA-256: 7c4ce9083af69d37cfbeff2f42a37be5dd8f002632913184ba9acd1749d65b3e
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/strik?utm_term=super+mario+advance+rom+europe'. This URL is presented within the document's content, disguised as a link to a game ROM. The ML classifier also strongly flagged this PDF as malicious. The combination of these factors indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=super+mario+advance+rom+europe In PDF document text
    • https://regenapewafixun.weebly.com/uploads/1/3/4/3/134364718/pofewizo.pdfIn PDF document text
    • https://kewojifusufiw.weebly.com/uploads/1/3/4/6/134662328/kozozatu.pdfIn PDF document text
    • https://jejabulalirolu.weebly.com/uploads/1/3/4/4/134464322/9947711.pdfIn PDF document text
    • https://lorovojiwu.weebly.com/uploads/1/3/4/3/134318747/2123953.pdfIn PDF document text
    • https://setivegubuwo.weebly.com/uploads/1/3/4/4/134446573/pofezezokul.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/b225ebdc-3f5b-4161-97ae-90cf883e3705/98415635457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9123e5b7-64d4-4467-a036-442ee02e12b5/13190618063.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/words_beginning_with_lam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c317f92-4776-4f25-bba9-d6a8a5c4109f/10134537241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31134fb-6192-4f3a-9499-af6f55281bd0/45864015030.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/vukurogowiletizuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92766cfb-d678-4161-a1ee-58684e6ae01f/51383597731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/713fc1da-039c-4415-bc51-ca6070ea4e0d/la_puente_building_and_safety.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a419fb1-93fe-4ef9-8338-e620ff7e3ba2/51524071984.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_off0000af57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF57 5172 bytes
SHA-256: b3575d9c4ab74382e8b3a94c816f103601eb9fd1a9286dbed55640c5564661eb
font_01_sfnt_off0000c0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E1 10532 bytes
SHA-256: 37579d77ad50c70556701c59e1e8dea71cd16f4d6240a2e44776fe71c75ad864

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