Malicious PDF — malware analysis report

Static analysis result for SHA-256 f102fa43cb5729a9…

MALICIOUS

PDF

88.0 KB Created: 2021-03-14 19:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 83c336f44523d892dc55665f7ac6cd8f SHA-1: c0600c81e63718e4dcea73607b189a71e33bc01b SHA-256: f102fa43cb5729a9339f30549662dc13dd4edb912df33f222ee63ce52005bd96
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to potentially malicious or disposable hosting sites, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by identifying a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=pcl3+lewis+structure+shape PDF link annotation
    • https://cdn.sqhk.co/tawunipufop/jjn0Pii/tegax.pdfIn PDF document text
    • http://zobebukore.22web.org/webasto_heater_parts_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/funixatugesi/gXPjcT2/66548796886.pdfIn PDF document text
    • https://cdn.sqhk.co/xalesikozip/7FTvjeo/thoroughly_enjoy_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410965/normal_5fdad4f54d918.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/r8MHlia/wixubopeva.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/0UiggdW/play4fun_free_online_casino_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444850/normal_5fdf000136c8f.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/aTrLih1/27852497624.pdfIn PDF document text
    • https://cdn.sqhk.co/zipuzedozame/higggUo/buttercream_icing_cake_decorating_ideas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/taranagar_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/kemonifotazisipoweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461d919c-8916-4376-9639-7b0b88221292/hp_officejet_h470_replace_ink_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75532db3-a9d6-4bba-8ae8-07dda9c36609/how_often_bodyweight_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f55e6a-9de9-4c20-9d5c-58ef11ed6813/aa_12_steps_and_12_traditions_step_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e614c6d4-736c-4ba7-bd5d-cd46e6b30da3/4543229113.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/47926391250.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/zulagidesimi.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/xizuka.pdfIn PDF document text
    • http://noxifepa.rf.gd/37744544377.pdfIn PDF document text
    • http://jijazofar.rf.gd/wurumipig.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_off0001175c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175C 5276 bytes
SHA-256: 33d16ae4490627bc652de1a830f7c500beb6c3055885a1e7c8e9301f9a665958
font_01_sfnt_off0001295c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295C 12172 bytes
SHA-256: 6c1aa247379f49ed0755045c9b31e758fc5d8e8a6fa02e9458da1885a4a26488

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