Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aea574c60ef0562…

MALICIOUS

PDF

77.7 KB Created: 2021-03-30 05:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7c765049b44d633448b0c98dea69f19 SHA-1: 7bc5c1777caa17731e1668fd12a9fd0b94f715b5 SHA-256: 4aea574c60ef0562675f9059c98b038268ea49ac735e06961b6f7ba81d4581c8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by a ClamAV detection and an ML classifier. It contains a large number of external links, with many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of numerous external links and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/aws?utm_term=what+is+the+best+data+science+bootcamp
    • http://zurujavurobe.scienceontheweb.net/jilixuziwabu.pdf
    • https://cdn.sqhk.co/difixoruze/GhehdXG/15712134548.pdf
    • http://wuwodijutorem.iblogger.org/glock_19_gen_4_stock_trigger.pdf
    • https://cdn.sqhk.co/rowavarop/SCShajg/nejujivozikizep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_e45fc7d1e509472b996c386c50fb78d5.pdf?index=true
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_90f72557e79648099bc5365a08025bdb.pdf?index=true
    • https://s3.amazonaws.com/sizabo/eiffel_tower_summit_tickets_without_guide.pdf
    • https://b7b9a0d4-d71d-433a-9dbc-8293b1c729aa.filesusr.com/ugd/979434_3559eac4932344f882333181370b9627.pdf?index=true
    • https://63209029-b609-4f89-80e5-af59b408cdb4.filesusr.com/ugd/0713e6_e2816293c5c34040959d97f45488a52c.pdf?index=true
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_cc0564e314504a5683908950b0100e70.pdf?index=true
    • http://pugupokevimukov.epizy.com/vuduzelufibivafemonanaga.pdf
    • https://s3.amazonaws.com/sudevejerifu/halleys_bible_handbook_1965.pdf
    • http://vokesakogo.onlinewebshop.net/fifexononalopebivodibezux.pdf
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_198c6eb40eea41d390705e5b346afaa7.pdf?index=true
    • http://xovufavon.rf.gd/79846330833.pdf
    • https://s3.amazonaws.com/dazuxujepov/mizomeresizazovuwofir.pdf
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_79fda323403748568c5393f417c56853.pdf?index=true
    • https://8458b573-1d6d-478c-912c-b10a972f31df.filesusr.com/ugd/150112_9ac2333eb8f04337a37734413df5c828.pdf?index=true
    • https://s3.amazonaws.com/tiluwisulepam/ratuxojuz.pdf
    • http://labazesunug.epizy.com/hungry_shark_evolution_mod_apk_androidoyunclub.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_off0000f033.bin
2fe4c8305d715ffc7cb92a0c40625a4b145471432d6b0dff55d09cc1697434a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 5340 bytes
font_01_sfnt_off0001023d.bin
658530d80456fd230215ee6849aff7a58f6a814b8383f588521bcdbf721e4965		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1023D 11444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.