Malicious PDF — malware analysis report

Static analysis result for SHA-256 613c016ee2ac4748…

MALICIOUS

PDF

66.8 KB Created: 2020-11-26 05:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 079e2915e93a303a08bd065b03020a75 SHA-1: 72d9ef8044105c6d2166cf8da9f49d7d2d0901b8 SHA-256: 613c016ee2ac4748b6b1d83d71d1077a8bc3c6f9de7c186349bbf6a00aece461
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 'https://traffine.ru/strik?utm_term=male+extra+real+reviews'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/strik?utm_term=male+extra+real+reviews In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/risisipajole/journal_libert_algrie_d_aujourd_hui.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f6c588-6e72-441a-98b2-0ad3dd587a1b/porosojilelovewadojupori.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/rasibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75afde92-f93e-4749-b4fa-59651ebeed27/toledo_public_schools_calendar_2019_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/92889881416.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/guvubudifevo.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/xovemigezokoxagumumibagi.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/71639072011.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/68645161945.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/66252949256.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_off0000ca80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA80 4904 bytes
SHA-256: d9a3684d08cabb35a90e30e366815c0d463da6692485edee79b908e9ee61f1ce
font_01_sfnt_off0000db5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5B 10552 bytes
SHA-256: 289b69ee69ccd3a6371f9da1104c5137944c0d9e9cd14984746f11ab52e5cdc0

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