Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f2538b647f8cd5…

MALICIOUS

PDF

70.7 KB Created: 2021-04-27 03:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca066900b1cf573426f0468939f585c5 SHA-1: 32b92f95579f1bff36558d419c87f7e70fe2b205 SHA-256: c3f2538b647f8cd513636f2c7ba5811fd2ed377ff38c416474f313bbcdfd399e
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain a lure related to a 'Kidde smoke alarm'. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7759

Heuristics 4

  • 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
  • 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/strik?utm_term=kidde+smoke+alarm+going+off+every+hour
    • http://dodemul.mygamesonline.org/53622470077.pdf
    • https://zesajuletolif.weebly.com/uploads/1/3/0/9/130969916/xesizo_talimewepob_lidagininupit.pdf
    • https://rowozone.weebly.com/uploads/1/3/2/7/132740293/2509897ecf.pdf
    • https://vazagivire.weebly.com/uploads/1/3/4/8/134874695/rumaguk_mopubuxudovik_mutipideruwo.pdf
    • http://lofitner.buzz/how_to_do_a_risk_assessment_matrixai94k.pdf
    • http://warowusavi.mywebcommunity.org/henrik_ibsen_a_dolls_house_movie.pdf
    • http://prizinsta365.website/nukenaride0hvyy.pdf
    • http://walletelectrum.buzz/cuanto_es_5_milimetros_en_pulgadasdzigz.pdf
    • http://pumba-timon.space/5129710960250brv.pdf
    • http://vozuzutiwajuzip.getenjoyment.net/61550550864.pdf
    • http://latitekiwa.scienceontheweb.net/14721809033.pdf
    • http://draiwenstore.online/643351128540bmoj.pdf
    • http://normaa-id.com/graco_pack_and_play_changing_table_attachment_instructionsrvjow.pdf
    • http://latencfsrt.space/which_smart_thermostat_does_not_need_a_c_wirec3as0.pdf
    • http://ita-bio.space/how_to_pair_new_remote_to_roku_express71pm5.pdf
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/duwefofi.pdf
    • http://reassurez-moi-fr.info/56907910225rvysq.pdf
    • http://shopsupergood.site/epson_v370_perfection_flatbed_scanner_driver6cpjb.pdf
    • http://bottlechainworld.com/kung_fu_panda_2_netflix_uk45gqf.pdf
    • http://copyright-rules-help.com/how_to_connect_turtle_beach_to_xbox_one_controllerocq4h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5ecec4af-617f-414b-aaeb-d9f2f06e9003/favikepedefuluvotipem.pdf
    • https://uploads.strikinglycdn.com/files/be32b857-a0e5-47a5-97ca-d2e697ddfe0f/18178285938.pdf
    • https://uploads.strikinglycdn.com/files/ba8ae2b7-387f-4012-8ff8-4bcf2de9c6f2/nivutaditeziwev.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94b.bin
79527ed5673140bcceeb9f0b1481a4caa85ed4d19cc75ec37eda047d0f973e81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE94B 5516 bytes
font_01_sfnt_off0000fbf0.bin
4e9a135fc47904c8cbc1edf10f505049f7f5d7f236b56f0ea5c7a831b45f1b2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 10760 bytes

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