Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4767afb5a9cb80…

MALICIOUS

PDF

86.9 KB Created: 2021-03-30 16:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96536742e8651644a7d9ff7af4b47a8d SHA-1: d1d0c6e702d22bac306da85b523a10453cd9ef8f SHA-256: db4767afb5a9cb8095865b7c2c5e4714661975f210877f3c46c7919e2da43812
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary focus on directing users to 'ponafet.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or serving malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://ponafet.ru/wix?keyword=juegos+android+apk+full
    • https://static.s123-cdn-static.com/uploads/4501965/normal_5fdfb1fa513a8.pdf
    • http://pinezotamex.getenjoyment.net/how_to_replace_ge_dryer_timer_knob.pdf
    • https://static.s123-cdn-static.com/uploads/4369771/normal_5fcfb7c1d700e.pdf
    • https://cdn-cms.f-static.net/uploads/4379222/normal_602093ab6f2ed.pdf
    • http://probkin34.xyz/technics_sl-d20_service_manualw4gky.pdf
    • https://static.s123-cdn-static.com/uploads/4366312/normal_5fcdba0ed25de.pdf
    • https://cdn-cms.f-static.net/uploads/4375704/normal_60485f514e296.pdf
    • http://mir23.xyz/73043302422c0psj.pdf
    • https://cdn-cms.f-static.net/uploads/4409403/normal_603d17d32c3e8.pdf
    • http://sait-ok.ru/duwif9k435.pdf
    • http://merotudonor.mypressonline.com/archicad_training_series_vol_4.pdf
    • https://static.s123-cdn-static.com/uploads/4475734/normal_5ff1ee6150a22.pdf
    • https://cdn-cms.f-static.net/uploads/4382613/normal_6014a49cc695d.pdf
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5ff552b63f464.pdf
    • http://christinaanddavid2019.com/lagu_dsas_dunia_sementara_akhirat_selamanyayy6k1.pdf
    • http://usesol.xyz/84607245956cxf2g.pdf
    • https://static.s123-cdn-static.com/uploads/4374700/normal_5ff71a2b56e13.pdf
    • http://3gusevshop.space/jawofasokrzyju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fupuvomevo.rf.gd/wosunukupelavivawojo.pdf
    • http://mosararivifu.rf.gd/zuvose.pdf
    • http://wipibefab.onlinewebshop.net/life_below_stairs.pdf
    • http://sulijugofogim.onlinewebshop.net/quote_about_walking_each_other_home.pdf
    • http://milojomalodomu.epizy.com/ali_baba_and_40_thieves_story.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7cc.bin
f301212ab6f9856a23cb2441df18449e0639bfe26534cf42e596b955caf31f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 3220 bytes
font_01_sfnt_off00010367.bin
4090084474cdd2c80a09973b04612d2378dbd5d419916aa95efe64b268e86cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10367 5260 bytes
font_02_sfnt_off0001155a.bin
4f12d283dce5e3bd9e95e3afcdb4cf7f54c780757cfa1c5d8f30ef6ff2190229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1155A 3384 bytes
font_03_sfnt_off00012345.bin
3ca4f079157a65f1407447ed70dd333baedce948d67928aea012ea7e823b4c81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12345 12936 bytes

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