Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8efc8415c60ee1…

MALICIOUS

PDF

71.5 KB Created: 2020-12-11 07:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c33daebb3661b1265dafb2491381a912 SHA-1: 3d8be851f7124f9d5e8a89a4364aa1eb7a992663 SHA-256: 0f8efc8415c60ee1060b377f712a31e735954ec19bbabe5fc9832cdb740fe2c4
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://traffking.ru/strik?utm_term=mahout+in+action+pdf'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://traffking.ru/strik?utm_term=mahout+in+action+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446931/normal_5fbf7bce91bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5f9a3ea13fe7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5fb4c27819049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498702/normal_5fb2933ceb2f2.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/1f5a81eb-98c8-45f0-bfd3-a924cb08247f/99144863114.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19fdcbd14ff0dd2a1cd42/t/5fcd8a7be43f2b00a8c13cba/1607305876288/army_prt_running_drills.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc562177d0c8f249d5ee8a2/t/5fd1abed7c12252903f1f100/1607576557940/ralutufemibipawumor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30fa5bda9c57a97cc46e9/t/5fc5a09de6d49a06bb551806/1606787233822/best_buy_gaming_laptops_under_500.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3257f3de5e49b52ed4bc/1606300247618/what_size_ice_axe_do_i_need.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/39863985445.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_off0000dd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0B 4944 bytes
SHA-256: 88bc9989fef302e1369fac378b38efb3686ebec30e69a42cd7b9c3b89fa9bcc0
font_01_sfnt_off0000edf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF2 10832 bytes
SHA-256: 879fc87c2e3657500f32add568f69a98c32552ce3bd0f0cb769626613f718fce

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