Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6254ef5275b641…

MALICIOUS

PDF

74.1 KB Created: 2021-03-29 11:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a426e189f9586cd52bd3038de03747ce SHA-1: f59a33bd5c4989408320e9c91a5800b38ec260bb SHA-256: 6d6254ef5275b6411af315fcde12f2524e03fba4701248ee4f97766cba6a2cd2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or distributing further malware. The document body, though heavily obfuscated, contains references to 'death run 3d download' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/wix?keyword=death+run+3d+download PDF link annotation
    • http://sallehq.xyz/electrical_theory_for_dummies9fnbf.pdfIn PDF document text
    • http://iglivesupportteam.com/bbc_food_guide_pancakesgg4ld.pdfIn PDF document text
    • http://straponartist.com/cloudy_with_achance_of_meatballs_2_barbkzj9n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_604678d76e967.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445114/normal_5fed213fda70c.pdfIn PDF document text
    • https://jabevemejo.weebly.com/uploads/1/3/1/4/131483275/3036448.pdfIn PDF document text
    • http://ourfanz.com/87960433502yo1ir.pdfIn PDF document text
    • https://fekamudubop.weebly.com/uploads/1/3/5/3/135325245/6c7e060b23a.pdfIn PDF document text
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/bd7decf69261fb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_601ec1ff832c1.pdfIn PDF document text
    • https://tabawowap.weebly.com/uploads/1/3/4/5/134599755/zufiwekatukafileze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_602884ca32de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5ff2f8b858b7e.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://febiterozoz.medianewsonline.com/capitalismo_e_liberdade_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://badamowafe.onlinewebshop.net/apex_developer_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6aa3a46-5af8-48dc-a3aa-b17479df2040/12149810403.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/print_october_2018_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0666059-08e0-4cfd-9928-9ac2d9c85293/wubitopafemena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd3db68-3125-4a45-a296-526f97a6d407/holy_book_quran_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/lyocell_bed_sheets_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5cfff53-b5d8-4ed8-b2f8-da34535ed624/non_destructive_testing_methods_slideshare.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF50 4988 bytes
SHA-256: ec93e1b9112f3fa2a3d0ee95ad0690b6751311b48d55c22a846b3b0957659df4
font_01_sfnt_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 10724 bytes
SHA-256: b886c76af40826e1ef1b89eca3207459bc6b1e359a21d196161bb22de994ffb2
font_02_sfnt_off0001050b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050B 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e