Malicious PDF — malware analysis report

Static analysis result for SHA-256 369f3b4a48b891ba…

MALICIOUS

PDF

85.3 KB Created: 2021-03-21 06:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ada74e32bc7703bb50d5579138f1065 SHA-1: 2cc6cb0eb3614095f0a55d9d214d570e75313fca SHA-256: 369f3b4a48b891ba3bd6bb3cd679c9482cf1ccef9d5e1c5bfcb1fde773f5d530
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further indicates a lure to trick users into downloading files. ClamAV detection and ML classification confirm the malicious nature, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=narco+radio+repair
    • http://keksik24.ru/julusoxh0hq.pdf
    • http://bukudix.getenjoyment.net/96069999247.pdf
    • http://tiktoktop.design/fodezoliux0ad.pdf
    • https://bajarewejewud.weebly.com/uploads/1/3/4/6/134673735/f1668.pdf
    • https://mirivibi.weebly.com/uploads/1/3/4/2/134234555/5643113.pdf
    • https://mopokelam.weebly.com/uploads/1/3/5/3/135349304/d0250d58add.pdf
    • http://kesisofawa.mygamesonline.org/little_nation_and_other_stories_summary_sparknotes.pdf
    • http://fruitslope.online/ac_dc_greatest_hits_mega0vks5.pdf
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/152896.pdf
    • http://paxezot.getenjoyment.net/nadul.pdf
    • http://wubowobipevoto.mywebcommunity.org/the_standard_east_village_corner_king_room.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6449d645-4d49-4e2f-8614-73273459883a/20262590133.pdf
    • https://uploads.strikinglycdn.com/files/50c0db08-931d-49ca-8665-b7a04ccd4608/how_to_connect_wii_remote_to_dolphin_without_bluetooth.pdf
    • https://uploads.strikinglycdn.com/files/9842eac0-5771-42fd-9d78-8bb900111a3e/2007_mazda_cx_7_starting_problems.pdf
    • https://uploads.strikinglycdn.com/files/57f528d9-dc1a-4ce7-8cb4-fd6fbc2170dd/9083587497.pdf
    • https://uploads.strikinglycdn.com/files/4fc4e1a7-c8b7-4a33-b472-0159fb3d16ce/ruwabaj.pdf
    • http://wazeniwemir.onlinewebshop.net/innovativeness_scale.pdf
    • https://uploads.strikinglycdn.com/files/dda9a889-53d5-4671-aa5a-a5faee20cd90/mupapavu.pdf
    • http://xuvekixofeku.onlinewebshop.net/karedeparaxama.pdf
    • http://nuzikenevizut.onlinewebshop.net/22002009181.pdf
    • https://uploads.strikinglycdn.com/files/78a79c27-e143-469d-a57a-f3168f0370a1/simogilurenebe.pdf
    • http://sukokovevaz.atwebpages.com/lockpickinglawyer_pick_set.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_off000110f7.bin
6fd452391ffed27cac8324b368c85113f9f4f8d85686e2f9bf2973d3d4985c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F7 4824 bytes
font_01_sfnt_off00012176.bin
f2e41160d7a8afccbbf209ab55a6fcd5a2bf6ca9d96c507f251fdcbcb75539bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12176 10940 bytes

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