Malicious PDF — malware analysis report

Static analysis result for SHA-256 808e78d2464343f9…

MALICIOUS

PDF

81.9 KB Created: 2021-03-30 00:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11dd1927fba82ab73ea5d50a9cb11493 SHA-1: 766d38060e238067d964da1bb3c90491945bfcac SHA-256: 808e78d2464343f9138bd695a0094591f54f434b50cdf9ad4b3218f361b51f13
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is identified as a link farm. The primary malicious URL observed is https://ponafet.ru/strik. The document body is heavily corrupted, preventing analysis of its specific content, but the overall structure and URL distribution strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=live+life+with+passion+live+musically
    • https://cdn-cms.f-static.net/uploads/4366305/normal_6060174d10247.pdf
    • https://tofesozexeraj.weebly.com/uploads/1/3/4/6/134610570/sevuxetoja.pdf
    • https://cdn.sqhk.co/surofowudula/gAOXpgg/ultimate_epic_battle_simulator_mod_apk_unlimited_money.pdf
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5feb3fe31e071.pdf
    • https://static.s123-cdn-static.com/uploads/4375342/normal_5fe18730098c2.pdf
    • http://fesigemujelepir.66ghz.com/jinosuz.pdf
    • https://xokekomoto.weebly.com/uploads/1/3/4/5/134598663/15a97bcb.pdf
    • https://lizakefamejoxen.weebly.com/uploads/1/3/1/3/131384135/jomisuzivosijepoxuka.pdf
    • http://fejovamujolod.22web.org/59607202852.pdf
    • https://cdn.sqhk.co/zimidenex/LjeW4ie/4119720474.pdf
    • https://static.s123-cdn-static.com/uploads/4469837/normal_6008c15058ed9.pdf
    • http://saxefitipar.iblogger.org/fetijidesifi.pdf
    • https://cdn.sqhk.co/lexaxemiji/fdJNh9D/papiva.pdf
    • https://cdn.sqhk.co/wadelovelo/gMg1hL0/beautiful_scenery_wallpapers_for_mobile_download.pdf
    • https://cdn-cms.f-static.net/uploads/4489259/normal_5fe8ae8f7ae45.pdf
    • https://cdn.sqhk.co/fukafodifi/Vc5MkRM/mafatopokonipodavamafuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ripajadiw.rf.gd/9028986398.pdf
    • http://zizajurowetomej.epizy.com/harry_potter_8th_book.pdf
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_077aafd897494e8fbdd69633f814e0dc.pdf?index=true
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_d409df2183604751bf9f23d22903a218.pdf?index=true
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_09d0db7c362a465e9817c5249f698cfd.pdf?index=true
    • http://xupapuxonoxun.rf.gd/how_to_setup_elgato_hd60_s_plus.pdf
    • http://tekefugenira.epizy.com/tuletutifoxazuwitow.pdf
    • http://lufeneweb.epizy.com/bhaagamathie_tamil_full_movie_free.pdf
    • http://vepilezora.epizy.com/50835017357.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010061.bin
c749f2e8314701aa6e12fb182e79ac80303e4b872e026d9335037c73c6c4e929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10061 5352 bytes
font_01_sfnt_off00011295.bin
9bc9944e3bc9f215eec018b0372078f2143cbea471b5c70bddb7060c177edd89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11295 10816 bytes

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