Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e1d96b8966f70b…

MALICIOUS

PDF

78.3 KB Created: 2021-04-30 09:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6177cae8c22b6450dc4793fb3c8bd3b2 SHA-1: 9a816764ca34fa9ae4e79e477c93389c8610ed69 SHA-256: 22e1d96b8966f70be381b2e1217767092ddb951a29cde08b965de74f0c35398f
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are designed to appear as search results or related content, a common tactic for phishing and malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. While no scripts were directly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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
  • 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/strik?utm_term=metro+2033+chapter+5+alley
    • https://cdn.sqhk.co/letaziseb/TFWgf2O/art_therapy_university_of_florida.pdf
    • http://pezuzumosuxuku.22web.org/gelovumogufi.pdf
    • https://cdn.sqhk.co/fomolunuvufa/hfnkow8/space_pong_idle_ball_ping_pong_challenges.pdf
    • https://cdn.sqhk.co/nugutobudan/ijieigf/magic_castle_hotel_room_rates.pdf
    • https://cdn.sqhk.co/saseponirifa/iJjbLyZ/726365877.pdf
    • https://cdn.sqhk.co/juwafajem/zjh2JxX/nintendo_switch_online_shop_philippines.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tokatefozude/breach_of_contract_lawyer_free_consultation.pdf
    • https://1b6a1bbc-c127-422b-858f-c975555fd18f.filesusr.com/ugd/31f47c_acd9d630877842d994b50aa27db48f88.pdf?index=true
    • https://s3.amazonaws.com/petuzutemixuvod/arya_telugu_movie_songs_320kbps.pdf
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_07cb0e9864974ae790f6172e04f0b427.pdf?index=true
    • https://s3.amazonaws.com/fusopoxipo/65451055005.pdf
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_0263e3b705094be4bfc83951d125e6d6.pdf?index=true
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_b69d4ca1f9ed461f9f5efa47aa774593.pdf?index=true
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_df42df8349be48cf9421f04cf9220a15.pdf?index=true
    • http://kefujamulewim.epizy.com/oki_printer_mc362w_manual.pdf
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_e5756154f55a43b3abbaf46cbccd5093.pdf?index=true
    • https://s3.amazonaws.com/vibasujefir/52070031540.pdf
    • https://s3.amazonaws.com/zomuzigo/jikor.pdf
    • https://74bb8966-1fc2-43cb-a641-24c20f380d28.filesusr.com/ugd/84c7b5_744bfca773624453a8823e300dabf31c.pdf?index=true
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_d8c124a34e7c4bccb88c8c0fb8e70509.pdf?index=true
    • https://877305ac-a74e-4e93-918f-f866ec7622df.filesusr.com/ugd/0dac30_d8a72ad08e57403cb58cd99b4a9bfde3.pdf?index=true
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_6f45c01de74e4da7bed66d2ba864f2ab.pdf?index=true
    • http://fudewisukot.rf.gd/loluretiliverorekoni.pdf
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_464419c3d8b14b8cbcd7049572354213.pdf?index=true
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_6a22d20efcac467d9211d333593aeba8.pdf?index=true
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_471a4f561a44485685f7b8d13e111fe2.pdf?index=true
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_6c8ee6e58e43424e99d8ce0046cd7ee7.pdf?index=true
    • 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_off0000f1ec.bin
e1be5197e10270be4082f7c0076b70cffa5da2016f130e21401ff3b601d8805d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EC 5512 bytes
font_01_sfnt_off000104ba.bin
f856ce50ddc4402df7178093ac7047d24af3af42d62b215da66494b002646901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BA 11468 bytes

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