Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdc5d4350afbb9d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-14 04:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f11b383ce510ee3bbe06b2e883a74ccb SHA-1: d72fff334f51d2fcb8535f110616db553581738f SHA-256: 9cdc5d4350afbb9d7c843671340bded6e10b698fe33f1b43adeb391920e08bba
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('kuzutuzo.ru') that is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'Pioneer vsx-522 remote', indicating a potential attempt to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=pioneer+vsx-522+remote
    • http://warowusavi.mywebcommunity.org/case_for_a_creator.pdf
    • http://avtoshtorki.shop/biotic_environment_includes_mcq97y9b.pdf
    • http://pop-marketplace.ru/46721108508jyhx4.pdf
    • http://hotita.space/ligajodujr76.pdf
    • http://pofuxubilet.sportsontheweb.net/bulonivabelesuviraviban.pdf
    • http://goshop32.site/dell_latitude_3400se2jk.pdf
    • http://roskycnmx.com/14460253166rx5z5.pdf
    • http://daimontimur.org/65454118226a86s9.pdf
    • https://cdn-cms.f-static.net/uploads/4375889/normal_6043f0d98515b.pdf
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5fd76b3420aa5.pdf
    • http://sayfelengs.space/historia_economica_mundial_libros_gratis1lejn.pdf
    • https://cdn-cms.f-static.net/uploads/4379974/normal_603faefd99a47.pdf
    • http://liko-sneakers.com/how_to_troubleshoot_a_steam_boileretw3o.pdf
    • http://lojasamericanasbr.com/13828162515mpgzm.pdf
    • https://cdn-cms.f-static.net/uploads/4425929/normal_604412e1add73.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_0a0531d879654367b0ccc8b52b538328.pdf?index=true
    • http://sipanokule.onlinewebshop.net/bonaxajap.pdf
    • https://uploads.strikinglycdn.com/files/d9777d01-36eb-40d8-8573-66a9d62ddaef/irobot_battery_light_flashing.pdf
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_9b7e056969554de1b2773f44dc5adbc9.pdf?index=true
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_5d9d1d78437e43779828f3441711c6ae.pdf?index=true
    • https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_4c3ac43eed90434492a47b0a0f88c05b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2bd698f5-c10a-4a81-82fb-6de29ea6c2b8/why_wont_my_playstation_gold_headset_work.pdf
    • http://sukokovevaz.atwebpages.com/garmin_nuvicam_lmthd_battery_replacement.pdf
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_1acf67d7e2b24459b6e56cfe0b8e8a7c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f3f56f4b-b74f-460c-8803-f79ff0094b8b/63504550311.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_off0000f555.bin
6e1d4598d145b67daff58de7757139fcd94be7d6881baa0a95351d956e5cf369		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 5008 bytes
font_01_sfnt_off00010665.bin
5b87363060c551dafd861a1f23d545983b53631cd2e561eae4aa209453e08c14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10665 11392 bytes

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