Malicious PDF — malware analysis report

Static analysis result for SHA-256 46904006d00ad963…

MALICIOUS

PDF

76.9 KB Created: 2021-05-11 19:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56d939209b882a28b02746e465779e55 SHA-1: 6a14ac88e96ea49a1a7685d0322a36697523c496 SHA-256: 46904006d00ad963ff286936ac445b0c77a2b8076ae58bf234c0a7144382a3c4
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to trick users into visiting potentially harmful 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://mezovuduw.ru/strik?utm_term=ge+helpdesk+phone+number+indiana
    • http://sibiwuketilivi.22web.org/cambridge_igcse_mathematics_core_and_extended_workbook.pdf
    • http://sozapemogoz.mygamesonline.org/wozig.pdf
    • https://cdn-cms.f-static.net/uploads/4479916/normal_6064299aba81b.pdf
    • https://cdn-cms.f-static.net/uploads/4388162/normal_602534c1d33f2.pdf
    • https://static.s123-cdn-static.com/uploads/4408584/normal_60005e34ef8f4.pdf
    • https://cdn-cms.f-static.net/uploads/4390329/normal_600b733f48eda.pdf
    • https://cdn-cms.f-static.net/uploads/4475586/normal_603ca91b39a28.pdf
    • http://podemufibe.iblogger.org/sogepapo.pdf
    • http://levotavo.scienceontheweb.net/wpf_tutorial_kudvenkat.pdf
    • https://cdn.sqhk.co/mabisurud/hjaBF2J/bridal_emergency_kit_amazon.pdf
    • http://retibojebefav.22web.org/effects_of_globalization_on_the_environment.pdf
    • https://cdn.sqhk.co/retagigimusa/jfPhcXl/yakuza_koyuki_guide.pdf
    • https://cdn.sqhk.co/suwapipejob/c4Vgdie/18161852301.pdf
    • http://amsidgi.xyz/the_song_bluest_eyes_in_texasuneq5.pdf
    • http://profer-opt.ru/970467751891r2mz.pdf
    • http://reduslim-buy.site/labilonofopamugatidajiguzgj64x.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tejoratu.epizy.com/vuxonupuwitot.pdf
    • https://s3.amazonaws.com/mokixetat/what_is_it_like_living_with_a_terminal_illness.pdf
    • http://zubiluwetij.myartsonline.com/a_government_with_unlimited_power_that_it_uses_in_an_arbitrary_manner.pdf
    • http://kulipipuxafoja.epizy.com/70038291039.pdf
    • https://s3.amazonaws.com/tobito/bahubali_2_tamil_movie_free_tamilrockers.pdf
    • https://s3.amazonaws.com/waduzirader/aps_schedule_2019-20.pdf
    • https://s3.amazonaws.com/xurixado/9575004894.pdf
    • https://s3.amazonaws.com/feborobegibew/tomixixi.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_off0000efbe.bin
94c4d9321b49ce6ed6972544f7f372732f7b2513bc107436492181ceabe292dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 5436 bytes
font_01_sfnt_off00010206.bin
a34de30a390583dfd2f9681a99d68ad1cc7fad080d9c735883bcee7ff4cc007f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 10408 bytes

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