Malicious PDF — malware analysis report

Static analysis result for SHA-256 a218306c455a7adc…

MALICIOUS

PDF

62.0 KB Created: 2021-01-04 17:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7ee026fd5b48ef9a33ef7337bf3e6796 SHA-1: 72267131cce367d570a85c91dfb051323922b134 SHA-256: a218306c455a7adcf59164c50fc9fd8edbbd4f12dce123cd60b3a7deac4ec389
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/123?utm_term=golf+buddy+voice+manual+pdf'. ML classification and ClamAV also flagged this file as malicious. The document body appears to be corrupted or obfuscated, but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=golf+buddy+voice+manual+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5fca70c9ed975.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393346/normal_5feeb596def6f.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/pibabopuduj/xugabomozorulev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c3d34e-9e30-4d58-b128-c4dfd891d208/65733103593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/861fd83c-cf5b-4fe0-9110-ba5b0cdedf48/69933728687.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/correct_form_for_bulgarian_split_squat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b92462-03c4-4d41-a339-1461c3cbf06c/34914340366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb9815e-5032-4c02-8759-cdf9dba977fc/off-_road_motorcycle_riders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1a8146-3953-42c5-9081-01634af97ba6/48163682007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9dadfce-895a-499d-bf3c-2505b15e9e66/gwinnett_county_court_records_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/84114911997.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_off0000b648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB648 5360 bytes
SHA-256: aabcc4ce301c507eb6eac6b9e390b2dd5da2218310b8a8789bff1c130a334ce2
font_01_sfnt_off0000c888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC888 10416 bytes
SHA-256: 26eb587d48fdb2d5eac480a63ab99f5af9f2ff0d52bf74550f2a43922b5c20c2

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