Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba44cd0fe7ac9389…

MALICIOUS

PDF

72.2 KB Created: 2021-04-07 23:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 917b08841fac5b92bb11a7f28cd03dce SHA-1: 90cd195b677aa08189071761e2baeebcef1cfef2 SHA-256: ba44cd0fe7ac93898b2e0f7cc7654068e2ab3a12b23378a0514e980092f1b4a6
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm strategy, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'Envision definition art' and 'wkhtmltopdf', likely serving as a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/strik?utm_term=envision+definition+art PDF link annotation
    • http://savineme.mywebcommunity.org/gopepizijanijijodusu.pdfIn PDF document text
    • http://game-pro.xyz/abu_garcia_black_max_3_parts_diagramz0pn5.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/jixajelonuvavovig.pdfIn PDF document text
    • http://udilische.club/29491589839jjsc9.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/i6K4FgY/fifa_mobile_20_chemistry_guide.pdfIn PDF document text
    • http://1xbet-football.fun/hp_laserjet_p4015n_maintenance_kit_instructionsjyyzy.pdfIn PDF document text
    • http://instapriz.site/how_to_fix_a_pressure_washer_hose_leak47ksi.pdfIn PDF document text
    • http://kzrovk.xyz/brandon_burlsworth_death_photoshoa5g.pdfIn PDF document text
    • http://topfrag.rip/kumajadejasanadopemumeoninz.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvevalor/hehjihu/geselazobikividosekuwiwuz.pdfIn PDF document text
    • http://cherrypimp.online/thea_2_modding_guidenzv0m.pdfIn PDF document text
    • http://parhelifrl.space/badger_5_plus_garbage_disposal_manualekc5b.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/ja4Jmfu/tudikagawotapozugidilo.pdfIn PDF document text
    • http://avit0.cc/cash_envelope_template_cricut6l6zk.pdfIn PDF document text
    • https://cdn.sqhk.co/zudusidesu/aYjiCQw/47686087480.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajowisomipuw.epizy.com/apple_music_offline_android.pdfIn PDF document text
    • http://vunolipatebaw.rf.gd/keleloresasixuwikibo.pdfIn PDF document text
    • http://moxozejoxolisuf.epizy.com/48531994712.pdfIn PDF document text
    • http://dafiwogi.rf.gd/doro_1360_mobile_phone_case.pdfIn PDF document text
    • http://kuxoxokazutuv.myartsonline.com/array_of_objects_c.pdfIn PDF document text
    • http://ziriboxemo.epizy.com/juvisov.pdfIn PDF document text
    • http://sogonuvusawi.epizy.com/kafozotatanimawu.pdfIn PDF document text
    • http://bopenakonaj.rf.gd/42522430453.pdfIn PDF document text
    • http://xivebimuma.rf.gd/26544120697.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_off0000e05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05C 4888 bytes
SHA-256: 073c267ebe5c0592abbc74c026e9fedb9925bcae3e441411d51398c0c4b2d8d2
font_01_sfnt_off0000f112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF112 10068 bytes
SHA-256: 78e87fb4db58b784391035b55fe9497cffe0d871bc7d3099f38b88c4a6c6e8d6

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