Malicious PDF — malware analysis report

Static analysis result for SHA-256 849d0e9c08327fac…

MALICIOUS

PDF

74.8 KB Created: 2020-11-25 19:36:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3cf887e99f1efd7b5745c85ed727f4eb SHA-1: 9b700e34b0d813b001ac55036d9fd455cd2b8d04 SHA-256: 849d0e9c08327fac87dd1473dc3f310521c75b61ea311524fb5b21eef2f767ce
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Throne rush cheats', suggesting a lure to entice users to click the malicious link.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=throne+rush+cheats PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423462/normal_5f9ce0d2c3a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f8e459246cb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5fa45452452b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_5f9a2e527cc90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f99d45750cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489852/normal_5fbb75a377923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_5faa8ad186b22.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/5b7a610d-82f4-40a4-8a06-9ca284172286/62138229739.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/sefopogatitesemubo.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/the_adderall_diaries_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027242a2-27f6-47be-b62a-ad97f550c9cc/nirenisosurobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5de77fd-a50d-46af-a991-276cc9012504/34901513848.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/35508816172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c2fb73-64d6-452d-95b4-772b0427336a/double_bubble_thinking_map_template_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8038dfea-f0c7-49e5-852b-aea769bc6b21/truck_bed_extender.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83C 9672 bytes
SHA-256: 3d333ba9b4732308721c05f6aec62618b42f593d41f36e3f7042b7604bb64781
font_01_sfnt_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 4804 bytes
SHA-256: 141443eac5fc4596c2afda9e1cd0de9168ea0362058c16f9160a52a7c7dc57aa
font_02_sfnt_off0000f8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AD 10988 bytes
SHA-256: dc520d13414614ca91f8ec438922e948ece938ae670950f3d5b3a1124e8fed91

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