Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6507c548f0b1e99…

MALICIOUS

PDF

73.6 KB Created: 2021-03-02 01:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0d9228365e5f95c4034f549566f0aee7 SHA-1: 68dbe60eaf8d110977e0db406a3e7a6364035f54 SHA-256: d6507c548f0b1e9945d0c7e0beb98ae2343f55f052dbdb33dde198d8c0be7adc
126 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of a phishing lure, specifically disguised as a repair manual. It contains numerous external URLs, with a primary one pointing to 'jumiwimov.ru', suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the distribution of malware or phishing content.

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
  • 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://jumiwimov.ru/wix?keyword=2003+hyundai+tiburon+repair+manual+free+download PDF link annotation
    • http://consumer-data-protection-bureau.com/kefusazorokidekoxipekanieo637.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484633/normal_5fdcae33d601c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_60152a0e96bbf.pdfIn PDF document text
    • http://free-at.pro/the_room_movie_2015v4r26.pdfIn PDF document text
    • http://pozuliruz.iblogger.org/nordictrack_c700_treadmill_belt.pdfIn PDF document text
    • http://kinokaiff.space/botulismo_infantilpz2oq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_60084180a998b.pdfIn PDF document text
    • http://re-capital.ru/kpi_tree_template_excelcyho9.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/gcgjRuz/kezuwalagijeweteranorax.pdfIn PDF document text
    • http://wowitaly.space/software_development_life_cycle_model_sdlc_agile_and_waterfallsv5gk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409827/normal_6027201e6894c.pdfIn PDF document text
    • http://haifaiv.ru/dale_carnegie_effective_speakingxoboe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_601889240e569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojemavipaxike.epizy.com/how_to_hard_reset_dsi_xl.pdfIn PDF document text
    • http://woxunegomuwajor.rf.gd/how_to_pass_network_plus_exam.pdfIn PDF document text
    • http://figedid.rf.gd/7130221531.pdfIn PDF document text
    • http://fakozavovenabe.rf.gd/55446815154.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_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 5780 bytes
SHA-256: 0187e0682bbf01e8b5ab542be0668345833bf6e75884fe371069a844a1aef3be
font_01_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 12140 bytes
SHA-256: fb15b8478dd95072dff2c41729d728dcb16b8dc37bb1b30559c39ab610127d7a

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