Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdc13729a965998…

MALICIOUS

PDF

73.9 KB Created: 2020-12-28 05:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 94b0b540b0dba3679ddad201f4a201b8 SHA-1: 91f6391e2bc8e54f10239b5374a8e6ad27d3ea8d SHA-256: afdc13729a9659988af4e4412f1c7f5ba56a50a09a57381ed2f45d2a1d2022dd
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'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful 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://traffmen.ru/123?utm_term=valkyrie+profile+skills+guide In PDF document text
    • https://cdn.sqhk.co/joduragenep/6jcje5j/grand_theft_auto_gangster_download_file.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/IDhiaij/soccer_star_lionel_messi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dosipive/25114203265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae821d48-3f4f-4b5a-852b-580fec4015ee/46694834539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fe2762-503c-4676-a865-7bdd99873de8/derofanevigoxumid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b0d8179-22d8-4747-a168-43d665a087d9/games_like_diep._io_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d04c896-9703-4da3-9080-de8c1de7bb40/chistes_de_hombres_cocinando.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/android_view_cancel_animation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64db07f-71d4-4bc3-94ef-2ab1bd9f354a/xozepirufivomazidemisod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511fa64e-80a0-4eaf-9ab9-98e7f76ea422/15203540912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc7984d-cc56-4938-9d16-cac525c9b943/ragexekorasurelejiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8800a8-56c6-46a7-abf1-2243e14f8682/95606101604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc8353d-5d0c-4e93-acc6-1b9ead1d0e61/75194827036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2abc4e-db0a-4a92-b557-e763e161f314/bebisudazutezutenegeb.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_off0000e283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE283 5340 bytes
SHA-256: f1581a6f0f9114ba5482093db6c9cc629b321a9753ea9f4f9824ce3d4e8a01e4
font_01_sfnt_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 11864 bytes
SHA-256: dbc2760826cdee5c5842f39ea1847c95b1595c46a9082ab1d130f4f61bea2195

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