Malicious PDF — malware analysis report

Static analysis result for SHA-256 933e63ff3e9b5f8f…

MALICIOUS

PDF

79.5 KB Created: 2021-06-04 08:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca4c082bf6dd728a05d814e44abb955f SHA-1: 51859949b97d7261d83d7b861058c16ed3a65d45 SHA-256: 933e63ff3e9b5f8fb485f7e86befc3b0ef2e541d64065898b89cf58476a9d8da
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on Weebly and appear to be part of a link farm designed to attract users searching for game hacks. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crysiq.ru/pbw?utm_term=hack+clash+of+clans+pc+download
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/29807e9b69e6d.pdf
    • https://dolufinome.weebly.com/uploads/1/3/5/3/135330980/jugoxisurulajerukaw.pdf
    • https://rozomibevepozif.weebly.com/uploads/1/3/0/7/130775668/9659018.pdf
    • https://kejedaxuz.weebly.com/uploads/1/3/4/3/134355680/mibeverofod.pdf
    • https://paxedobopesenun.weebly.com/uploads/1/3/1/3/131398064/7462793.pdf
    • https://vatewiwep.weebly.com/uploads/1/3/4/4/134482367/94267336.pdf
    • https://ragitodis.weebly.com/uploads/1/3/4/7/134753297/37aecf9c48b70.pdf
    • https://dexisuliraj.weebly.com/uploads/1/3/5/3/135346252/ad588e3484b.pdf
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/bawepagir_kubipawemuzum.pdf
    • https://loneluripovulom.weebly.com/uploads/1/3/4/3/134364014/bc34888d4.pdf
    • https://metoxuxiduwano.weebly.com/uploads/1/3/1/6/131636764/bepagipipajavupodo.pdf
    • https://satufikobupi.weebly.com/uploads/1/3/2/6/132695363/5926326.pdf
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/3673d19740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41df09f6-8fa9-4e9c-92c4-15becee1ece2/ranger_handbook_3.5.pdf
    • https://uploads.strikinglycdn.com/files/98c086b6-e909-4e87-ba66-51f60550b7ce/how_to_fold_up_a_total_gym_xls.pdf
    • https://uploads.strikinglycdn.com/files/c2e7c9a5-88c6-4bd0-988c-e43f29c2e003/best_demonstration_speech_topics.pdf
    • http://gipomebepate.pbworks.com/w/file/fetch/144597345/lamborghini_terzo_millennio_price_in_india.pdf
    • https://uploads.strikinglycdn.com/files/6146540e-5f61-40f4-afb3-af09b083322d/whats_the_renegade_song_from_tiktok.pdf
    • https://uploads.strikinglycdn.com/files/e389d307-4084-40bb-bb46-b38c545af60b/schwinn_recumbent_bike_230.pdf
    • https://uploads.strikinglycdn.com/files/3df7b1bb-8d90-4c18-82f7-1ec03e91b852/pepopelopamafoj.pdf
    • http://ririgifavem.pbworks.com/w/file/fetch/144595542/causal_comparative_research_definition_and_examples.pdf
    • https://uploads.strikinglycdn.com/files/06345448-4f09-41e6-a4fb-aed73318ac9a/do_politics_matter_in_relationships.pdf
    • http://sagidetubi.pbworks.com/f/how_to_reset_service_reminder_mercedes_sprinter.pdf
    • https://uploads.strikinglycdn.com/files/0ef961f4-98ec-49b7-8f42-d7bfb366a02a/mikalexepafavizemol.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_off0000fa3e.bin
6d83daa196e4bb19d1d1c6d4d48e1e0a91557f9a0bfe5d94e9e01597e54e8bfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3E 5264 bytes
font_01_sfnt_off00010c3b.bin
bd356083187f318070a8f06f07a3089e4bba92db05abda5dd34bf68df899a42e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3B 10424 bytes

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