Malicious PDF — malware analysis report

Static analysis result for SHA-256 c702308a5fa9653d…

MALICIOUS

PDF

79.1 KB Created: 2021-03-14 00:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c73fb6bbc3c7e520d78fcbd2d77b269 SHA-1: 2300a522d055321113355a309d61599d9f028cd7 SHA-256: c702308a5fa9653d4e764ced5b9ce8cdd2f9a33da8039592aad951ae909b37bd
156 Risk Score

Malware Insights

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

The PDF contains multiple external links, with one prominently featuring a keyword for downloading a movie, suggesting a lure for phishing or malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of numerous external links, including a link farm heuristic, points towards a distribution mechanism for potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=download+avengers+age+of+ultron+full+movie+in+telugu
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/tonibipob_zavovi_bagijilexile.pdf
    • https://cdn.sqhk.co/nisugavu/gjjgbji/monkey_flight_tickets.pdf
    • http://jevopapivixepe.iblogger.org/drawn_to_you_audrey_assad.pdf
    • https://cdn.sqhk.co/zevinikiwi/FDjaXtA/kosezikobik.pdf
    • https://cdn.sqhk.co/menasimax/ZWeRjcz/gewefurezotajijoxajijozuk.pdf
    • https://fodakapi.weebly.com/uploads/1/3/1/6/131637942/2975685.pdf
    • https://xajekedifa.weebly.com/uploads/1/3/4/4/134469171/61f0389b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gafibis.epizy.com/staples_paper_shredder_lubrication_oil.pdf
    • https://uploads.strikinglycdn.com/files/74d76349-15cb-477d-baa0-2b4fca6218ca/puvusogoweperifep.pdf
    • http://munoxefarofow.rf.gd/mifeguwaxurowurefitujero.pdf
    • https://uploads.strikinglycdn.com/files/652ab335-de09-4188-a38a-90f4ed90764f/contrato_de_arrendamiento_de_vivienda_urbana_minerva_diligenciado.pdf
    • http://tosakiviga.rf.gd/74525101480.pdf
    • https://uploads.strikinglycdn.com/files/e113d4da-6756-4522-afe6-622919d455b5/lulabevivulamaxuzovu.pdf
    • https://uploads.strikinglycdn.com/files/ec15b9c4-ed21-4f4c-957c-ab30cd5e9fb4/tekas.pdf
    • http://jekutekovemimav.rf.gd/assembler_sur_mac.pdf
    • https://uploads.strikinglycdn.com/files/db5f2b5b-fffe-44c3-9c8b-14521b6e5a3e/64439312277.pdf
    • http://vakebajenom.epizy.com/1970757315.pdf
    • http://toxukanubevaga.rf.gd/wudarepojob.pdf
    • https://uploads.strikinglycdn.com/files/acb7c6c7-3704-409a-8a68-ed37021b8417/89956801858.pdf
    • https://uploads.strikinglycdn.com/files/418cac30-f530-4fe8-9148-ddad55ff4ec0/97522536519.pdf
    • http://xixudemetabega.epizy.com/pepuro.pdf
    • https://uploads.strikinglycdn.com/files/2e262e19-3158-41b8-ab4e-cc3291623048/66875345848.pdf
    • https://uploads.strikinglycdn.com/files/66ca2903-48b2-4d0a-b175-8b646bd7cedb/how_much_is_ms_drivers_license.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_off0000f3c3.bin
cc2de0ed2f171851acc94c35fe0026e11fab131595ade420060e0fffeff09795		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 5380 bytes
font_01_sfnt_off00010619.bin
9ddd70a8d7d0c5d6a19b00bb5b665bbb62a101bf6c0a131202728a3fbeae9763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10619 11764 bytes

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