Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e415368e1fa2bc4…

MALICIOUS

PDF

76.9 KB Created: 2021-01-01 03:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 83183c6f22784c25fcadd36f54d97eab SHA-1: 3f243fb537fc6a9556dad0ac11d5719e9d71a59c SHA-256: 1e415368e1fa2bc4069ce4b2470d5db80754309806f80fd7ae30cd0314da20d2
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://traffine.ru/strik?utm_term=escape+from+prison+planet+lyrics'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=escape+from+prison+planet+lyrics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_5fb50ff7f22eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5faefc5759968.pdfIn PDF document text
    • https://cdn.sqhk.co/luvuxokam/iihtjfX/38859187202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5fa39df68d6bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369506/normal_5fc67c7423702.pdfIn PDF document text
    • https://cdn.sqhk.co/walumupo/mhaichb/74034347571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_5fa1c4aaf3a33.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/080816a2-8c2c-4c46-be82-366b8df3325f/xelizile.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/download_facetime_apk_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5481181-bd17-40ea-b513-d3cec64c8945/the_leadership_challenge_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/60831863978.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/11332936598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f78849c-1c95-42da-815c-1e6d10172424/psikoloji_ders_notlar_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2382e47-9f85-4df9-a0c3-d1c575ed503c/z_star_manual_juicer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb45c55-a4d2-4404-aacf-d21a4a70fb1a/ultimate_reset_nutrition_guide.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_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 5220 bytes
SHA-256: fb5fa134674cafb7428637d32a64f7a6bee3a1fc94e2e83a0dfd28f05e059970
font_01_sfnt_off00010374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10374 10368 bytes
SHA-256: 01a59bab969ab67514ac1a9e5c98eb75a942136a47b92c6044b959e88edeb982

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