Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4c6f537f3bfaf4…

MALICIOUS

PDF

69.0 KB Created: 2021-02-25 22:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bc45b9de5c30c72aa0f3204f37865b2c SHA-1: 028d8b182c6b64cced1745fee342eb30b1bf7379 SHA-256: dd4c6f537f3bfaf4cb80d0fdd85b68e87a8921a09578fe798ce532e09c8cd735
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/award?keyword=barron%2527s+ap+calculus+pdf In PDF document text
    • http://1xbet-regi.site/castle_of_illusion_starring_mickey_mouse_sega_genesismhdyl.pdfIn PDF document text
    • https://cdn.sqhk.co/dameseri/fsQbCG8/nedararuzoledisenofitunox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389823/normal_5fe357f5043cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495973/normal_5febb3934d42d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_60232b7fab5d0.pdfIn PDF document text
    • https://cdn.sqhk.co/juduxijumijo/fLihJE5/82201282477.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/jahihSX/business_plan_outline_ppt.pdfIn PDF document text
    • http://trokot-shopnew.online/fastway_cross_3d_games840f.pdfIn PDF document text
    • http://copriyghtconfirmed.com/50579428818j76ov.pdfIn PDF document text
    • https://cdn.sqhk.co/nufopusifa/ahjdric/aquapark_io_full_apk.pdfIn PDF document text
    • http://segwaywheelchair.ru/54955166582j3y5u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_600ce154a14b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kigavanus/96094369175.pdfIn PDF document text
    • http://pifimofizo.rf.gd/campbell_hausfeld_5_horsepower_20-gallon_air_compressor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BA 4868 bytes
SHA-256: 3b4eb2ccbb693d55added7bdffcc7bb3e48fa8dbd9d540dac35062016ce3ab62
font_01_sfnt_off0000d646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD646 10392 bytes
SHA-256: d688efee9b34152cab4133f87c86de24e9f1f6a0d2d2c389ae3d6083ded2f35b
font_02_sfnt_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230