Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4e6bac2b50fb1f…

MALICIOUS

PDF

67.6 KB Created: 2020-12-18 09:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 84e24dd9ff9a1cfc64a611d5f57f4fbc SHA-1: e9938403311a4aca1ae005c45b829ce451e41c99 SHA-256: 9c4e6bac2b50fb1f604413c3870dbc2a050609e828f1b12fafdc85bbedd97bc4
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 'traffmen.ru'. ML classification and ClamAV also flagged the file as malicious. The embedded URL is likely intended to lure the user to a compromised or malicious site, consistent with phishing or malware delivery tactics.

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=selvas+de+mexico In 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/6390072e-2d54-4cc9-b5d8-823aa63463c5/bsa_citizenship_in_the_community_requirements.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc659750a2757459b082a1f/t/5fcea3efc9e0980240246f27/1607377904892/57892160679.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29bc888c99b6d37b22e2f/t/5fcfacc157846c5b8360bc7a/1607445698949/dragon_king_clash_of_clans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22956709-2944-46c6-98ba-3d901ba3a5bd/lekalititesezamuxulimitup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2750fc41-2533-42f8-b4fb-efc070a17225/xonume.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/stihl_chainsaw_trousers_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfa857f-1c9f-49a4-9e87-d3025ec5827f/to_kill_a_mockingbird_study_guide_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/manual_instrucciones_alcatel_lucent_4039.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/capitulo_7_de_vacaciones_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/the_classroom_3_how_to_play.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1491d9698b02c7f233ff9/t/5fd1adb2b91f50015eeb6f8c/1607577011724/street_outlaws_cash_days_2019_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2a29c8-1af2-493e-b421-1f078405fd2c/kedutipuvadoxumubipisig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d724ef-d8de-47c7-b9d6-9408a1018842/vosadox.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/fezopadalosetop.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_off0000ca54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA54 5220 bytes
SHA-256: 0e1029f96538e76c2f51f267705d067565191308ab3fc6073df8b1b8c23e6fa9
font_01_sfnt_off0000dc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 11160 bytes
SHA-256: 14a8c6b0572d2c5d00076c59b9b6157b5f3e8cc94444911cf40d4190a1918969

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