Malicious PDF — malware analysis report

Static analysis result for SHA-256 059651376c5cbf06…

MALICIOUS

PDF

77.1 KB Created: 2021-03-22 09:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c4150ca0ecd37edb678b7072974220b8 SHA-1: ce8b103f37379a7fd1d1bf2742b579830f275a7f SHA-256: 059651376c5cbf061316a1c412493ac8e31221d8e6d9434a90193c139040a678
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous embedded URLs pointing to external sites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern. While no scripts were extracted, the presence of many external links suggests the document's primary purpose is to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=attic+red+figure+vase+painters+beazley+pdf PDF link annotation
    • https://cdn.sqhk.co/sotatixorawi/dJhajdR/16891786002.pdfIn PDF document text
    • https://cdn.sqhk.co/bumadawab/6IihgiW/blueberry_raspberry_jam_with_liquid_pectin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_603ee652b7b79.pdfIn PDF document text
    • https://cdn.sqhk.co/wipabamof/j8ij2jg/super_stickman_golf_3_premium_apk.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/textbook_of_physiology_by_a_k_jain_download.pdfIn PDF document text
    • http://jolidulikan.scienceontheweb.net/45954650774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_6048eecc8e792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401546/normal_5ff652b63ec64.pdfIn PDF document text
    • https://cdn.sqhk.co/kutupejotige/ja5eCrB/28022309126.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/Lghggw8/96195525667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387240/normal_5fed0094a0d37.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/4xpfibG/48050588241.pdfIn PDF document text
    • http://gewewenaso.iblogger.org/bonner_county_sheriff_accident_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/kenujowemi/k4haSge/wings_of_fire_dragons_hybrids.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwedilejom.myartsonline.com/suxuxil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7b1b17-e066-4520-8343-5d7904638335/safety_dot_rating.pdfIn PDF document text
    • http://gowepuxajotezo.onlinewebshop.net/model_bye_laws_of_cooperative_housing_society_2020_in.pdfIn PDF document text
    • http://modunatotuw.epizy.com/percentage_increase_decrease_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6eb500-7a34-4387-90ce-6c4a43e8e781/do_wireless_mice_use_batteries.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/bondy_and_murty_graph_theory_solutions.pdfIn PDF document text
    • http://tuzekesomumar.rf.gd/xafifeta.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_off0000ee89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 5664 bytes
SHA-256: df61e3e41fd25cea23c2d345291ab2a83e6f0303fddff9f08058a87a86a5b7ec
font_01_sfnt_off000101f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 11116 bytes
SHA-256: 3327548f931954770f7e711747cead86976635b961161575d373416372fdec4e