Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0dd47752f5a5da…

MALICIOUS

PDF

75.8 KB Created: 2020-12-15 06:52:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1237a52989584a9050d042e4cdbd995b SHA-1: 17ca769bdff2e508023165e6feeb715838dc393e SHA-256: 9d0dd47752f5a5dac2c58226ec4b87fb278615b60139f08fcb647343fc2d01d3
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://traffmen.ru/strik?utm_term=usb+vid_138a%2526pid_0011%2526rev_0078+driver'. This, combined with ML and ClamAV detections, strongly indicates malicious intent. The embedded URL is likely used to lure the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/strik?utm_term=usb+vid_138a%2526pid_0011%2526rev_0078+driver In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcf743d082c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f89d275b37d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f967926d3879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453891/normal_5fbdcb31b2bf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5fbf19f7b0b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_5fa05e15e0700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f8c95a87db61.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/6b174411-fecb-44bd-835b-009c1bab632c/233109199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d91b57-aa51-4a49-957e-f7768174b893/5e_crit_fail_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7c547f-aa32-402a-9349-a9a5b2d29cd8/vamizoxijanoxi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55280ab79f442f246e36a/t/5fca3e5641142a3c4b4a1137/1607089753065/china_visa_photo_tool_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da17cb2-2099-4fde-87e0-72c0283ee40f/madubokuw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbf0116eb00e3c4bba69/t/5fc3356b61e25426e1a0512f/1606628716927/dubiparowususezujevepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/235cc610-f63b-41bf-ab69-47e8f43d6a9e/animal_crossing_new_leaf_rom_citra_download.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_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 5320 bytes
SHA-256: 38f668c90ca325438482c2a0b22433a96bbde2ea7fe7a7bdf706fe6fc814faff
font_01_sfnt_off0000fd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 11380 bytes
SHA-256: 982370c723d2629e1ea06b3c6e538b7911cfd716019b4e499ba2729e502294ba

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