Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb934bc39797acd3…

MALICIOUS

PDF

44.3 KB Created: 2020-10-06 14:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ba347eaec2636f471a7f1afa841ff913 SHA-1: cf8a0499d0c69fcb7baed967d0a59e5f7680b9c9 SHA-256: bb934bc39797acd335a4034e91fc0b2f1484cbbea298e75ce325ac7984e286e3
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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://gettraff.ru/strik?keyword=canon+eos+6d+mark+2+manual In PDF document text
    • http://galuxaga.smallgroupsministry.com/uploads/1/3/0/8/130815026/4433684.pdfIn PDF document text
    • http://files.ericasclassroom.com/uploads/1/3/0/7/130738700/d6a84389fd975.pdfIn PDF document text
    • http://files.drtaoka.com/uploads/1/3/1/1/131164393/7087916.pdfIn PDF document text
    • http://files.leewestproperty.com/uploads/1/3/0/7/130739978/tanoso.pdfIn PDF document text
    • http://mikunod.mikeysbarbershopla.com/uploads/1/3/1/8/131856543/2021429.pdfIn PDF document text
    • http://buwuvoz.kellerbassteam.com/uploads/1/3/2/7/132712315/6156432.pdfIn PDF document text
    • http://files.chrismonroestudio.com/uploads/1/3/1/3/131381078/repux-vuvofema-bogipiwewuno-juteduwezixinal.pdfIn PDF document text
    • http://timen.oesaccessories.com/uploads/1/3/2/7/132740482/pimif-nazamow.pdfIn PDF document text
    • http://nofuvufo.shopcatchboutique.com/uploads/1/3/1/4/131438539/ramogipuvurube.pdfIn PDF document text
    • https://site-1038634.mozfiles.com/files/1038634/90016506600.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/98541559197.pdfIn PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/vivekisipifiwadem.pdfIn PDF document text
    • https://site-1043033.mozfiles.com/files/1043033/wapamimazej.pdfIn PDF document text
    • https://site-1038798.mozfiles.com/files/1038798/33121973702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 5228 bytes
SHA-256: 2bec0a60421912716a9d81a2bf13374807fdf26715d4784b9bb3645917d17d34
font_01_sfnt_off00008215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8215 10120 bytes
SHA-256: 26dd2d67ddc152eda792f1ea858d344b2aa5e092aa92a2e26a3a0d059ed9e88f