Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91725c578ab6b15…

MALICIOUS

PDF

70.5 KB Created: 2021-03-12 08:56:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47023f436752b3ee9068c7f5b2f25ed3 SHA-1: 1168baa8ce538998f2bde8084c3364655956b11f SHA-256: e91725c578ab6b151b7b3defb86493c1baccb82f5e51e7cbb53a51d3948941e1
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to suspicious domains, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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://resalured.ru/wix?keyword=kirby+peb+manual
    • http://stavki-na-sport.site/vofexuvofuzuwipetolekuru1nzys.pdf
    • http://peramabejakes.sportsontheweb.net/dubusob.pdf
    • http://ecoservice-vlad.ru/vurulavebuxonirexulosagepggk7.pdf
    • http://rasazajafatirek.mypressonline.com/75343118104.pdf
    • http://rufawefojag.sportsontheweb.net/17142142115.pdf
    • http://rubka.space/download_emulator_genplusdroidb5us0.pdf
    • http://zimezobot.getenjoyment.net/smartboard_exchange_painting.pdf
    • http://pollsexpert.com/que_es_el_dbo5bxbnz.pdf
    • http://lnstagramverifiedsbadgeform.com/jesse_livermore_how_to_trade_in_stocks_original0alo3.pdf
    • http://kinorio5.xyz/yamaha_timberwolf_250_carburetor_adjustmentsi6juu.pdf
    • http://xogunajeraxuda.mywebcommunity.org/54879991729.pdf
    • http://obzorov.site/waliniforozypeci.pdf
    • http://wajazenizur.mywebcommunity.org/pioneer_avh-270bt_memory_full.pdf
    • http://gamowenugeg.sportsontheweb.net/3545044574.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vekisofekibote.myartsonline.com/fefirovo.pdf
    • http://xupozivuruvuti.rf.gd/how_to_start_a_stihl_fs_130_r.pdf
    • http://kafotafuvodalix.onlinewebshop.net/tanupemakatir.pdf
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_d06e8b49e5764f03b261396334c31a3e.pdf?index=true
    • http://darotevu.rf.gd/is_ben_10_on_hbo_max.pdf
    • http://duguzikazom.rf.gd/jixiji.pdf
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_f5dbe2b370934f2583583032ef55b9b3.pdf?index=true
    • http://botuwosolu.rf.gd/babovupiwo.pdf
    • http://rivenoke.onlinewebshop.net/is_the_movie_girl_interrupted_on_netflix.pdf
    • http://sasavinoseg.epizy.com/zotulefetenemug.pdf
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_6f13f9ac4c3944a4a4b02275f9a41f5c.pdf?index=true
    • 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_off0000d863.bin
a0713536a14ed1bd7988ee854ce092cc1edfe72acf0bfa6076beb6ad713db3bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD863 4996 bytes
font_01_sfnt_off0000e952.bin
f6461031301903e5fd32e43c0371215f48270864834d0c88da9cc884af83c2e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE952 10376 bytes

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