Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2dbebaa7b952cc0…

MALICIOUS

PDF

64.9 KB Created: 2020-11-21 12:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 25472fcc2acd2c2547076291a9b953fa SHA-1: acf8f6b791b3f5b9459adaa64071603b2e1bc0c9 SHA-256: f2dbebaa7b952cc0f8ba83dc8a376ac4a482b52ba5a06251309d9e010da81111
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/123?utm_term=sodapop+curtis+quotes'. ML classification and ClamAV also flagged the file as malicious. The document body is heavily obfuscated and unreadable, but the presence of a malicious URL strongly suggests an attempt to lure the user to a harmful site.

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://traffmen.ru/123?utm_term=sodapop+curtis+quotes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fa41cd880749.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/49e97a5e-d052-4446-aae5-4f995fdc8d1c/43288587145.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/aterosklerosis_dan_arteriosklerosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd8f5eb-7ff3-4194-a4e1-def75163802f/hybridization_of_co32.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c7833e-f729-418e-a871-680796c561fa/winunidovimanexob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba24b1a-a726-41d3-917f-052ec1db4788/3926707795.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/59810597523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae2acd0d-3ead-490b-9d19-31ad4daf0fb4/dr_seuss_technical_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becd7a9c-453b-419d-81c6-74b3d9a4b5ce/93268047692.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/joindre__word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/642e5554-099a-4f6b-ba71-c9d1fab36679/44878292542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef35b942-50b2-461c-821e-5054030a394b/dusom.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/network_topology_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f4f5ac9-a381-4a30-924c-b14892b983a0/hooked_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6704ef3-9c58-4ee4-8942-cd1664633399/40519225153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f41586-30db-47d2-8cb5-e31a05e1bede/sample_letter_to_uscis_for_name_correction.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_off0000c339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC339 5264 bytes
SHA-256: a1c85d30861f2004870f6e448b023a3358a035c2bac21f124e2797e17b30194b
font_01_sfnt_off0000d528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD528 10096 bytes
SHA-256: 27617806c55bc6746e1b12cf8232d990b2e8cc9983017f2efc564813d9e316d0

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