Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92ff1661be12477…

MALICIOUS

PDF

74.7 KB Created: 2020-12-27 19:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71e206a1c94de4dd5e9d6b84248ab1c8 SHA-1: 140ceada19a34bb4da31730e06bb3a6c2fe61205 SHA-256: f92ff1661be124779ba74265c7e7f527de89c75fd89d842d4206590ea447aa68
222 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL designed to lure users with a fake movie download. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL and the overall context suggest the document is designed to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?utm_term=ken+park+full+movie+download+300mb
    • https://cdn.sqhk.co/gebijowokobe/FygULgg/tywin_lannister_father_s_day.pdf
    • https://gobebirerelimi.weebly.com/uploads/1/3/4/6/134651667/bf5143e0486.pdf
    • https://cdn-cms.f-static.net/uploads/4408172/normal_5fa82c8b6c818.pdf
    • https://cdn-cms.f-static.net/uploads/4464314/normal_5fa9ea3888b19.pdf
    • https://patufefuwo.weebly.com/uploads/1/3/4/3/134312622/gadodiw.pdf
    • https://nigizamizu.weebly.com/uploads/1/3/4/3/134319440/50d9fa60888c8c.pdf
    • https://static.s123-cdn-static.com/uploads/4449192/normal_5fdd3f0de4670.pdf
    • https://cdn-cms.f-static.net/uploads/4410018/normal_5f95818999a67.pdf
    • https://cdn.sqhk.co/vowibesep/hhfQidW/nagemejezesap.pdf
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/garekusutikugel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b5ca8a49-78f2-40b3-bff7-eb6b63fa3148/blood_done_sign_my_name_chapter_summary.pdf
    • https://uploads.strikinglycdn.com/files/d99924d1-911b-4f9e-bfc0-da2915f71d90/93733235838.pdf
    • https://uploads.strikinglycdn.com/files/25f61d85-5caf-4540-8344-832865961316/air_elite_locations.pdf
    • https://uploads.strikinglycdn.com/files/eca3533e-34f0-48d5-b333-631908e4e736/3187559345.pdf
    • https://uploads.strikinglycdn.com/files/2d4af9e4-134f-420c-b4db-1ff74f63ac61/imac_27_inch_review.pdf
    • https://uploads.strikinglycdn.com/files/7ddf9cdd-504c-43bc-a2b1-aefdb7d1e178/best_wolfenstein_game_ps4.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6bd.bin
fc0b24eba1938a60da225e09206544ad7eec041089d1b41daeb845a3e8b8b992		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BD 5640 bytes
font_01_sfnt_off0000f9eb.bin
664ed55c4af504106b291f2f4984d7c599bc176e00183b72cff8eade14cccee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 10296 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.