Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c4df795c6c599c…

MALICIOUS

PDF

66.0 KB Created: 2021-06-05 01:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e32936061b2970439ad64a4f201f4e2 SHA-1: 32aa0a3a09adc62e7f1ba67dd140a29b2c345ef9 SHA-256: c7c4df795c6c599cdfac53097cde601128c401da7126a2d7e2110fe536d0d182
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or a method to distribute further malicious content. The primary URL identified is likely part of this distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/pbw?utm_term=how+do+i+print+%252310+envelopes+in+google+docs
    • https://cdn-cms.f-static.net/uploads/4414848/normal_605d1a9b7efa4.pdf
    • https://xipididida.weebly.com/uploads/1/3/4/6/134698194/roferubebakazut.pdf
    • https://cdn-cms.f-static.net/uploads/4420224/normal_6046b2e3a57e3.pdf
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/lasiwodepige-dipurijirupes-wusobiwexoso-ragokaw.pdf
    • https://cdn-cms.f-static.net/uploads/4482191/normal_6013f052c4d3a.pdf
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/sijakuxugari.pdf
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5ffbbd4a91b7d.pdf
    • https://witudaki.weebly.com/uploads/1/3/4/3/134332653/nopusakezibaxib_vewuvujumiwug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9bef0fbe-e426-4455-a2db-e2850e3356e6/how_to_stop_a_top_load_washer_from_smelling.pdf
    • http://mibegenav.pbworks.com/f/reportar_alumbrado_publico_merida_yucatan.pdf
    • https://uploads.strikinglycdn.com/files/5d86be18-6295-4bf8-8931-30c4e8bb89ec/wezagirogedok.pdf
    • https://uploads.strikinglycdn.com/files/9296eed9-24f2-4d2e-a508-a0bbe8194de3/why_is_my_hp_officejet_5740_not_printing.pdf
    • http://gapufipi.pbworks.com/w/file/fetch/144543042/zugunofafutejifugurix.pdf
    • http://noxixap.pbworks.com/w/file/fetch/144426321/ruxujabudasupukedewiked.pdf
    • https://uploads.strikinglycdn.com/files/d0841ce7-97fd-46cf-87e8-95a34f5b301e/kipipijeveromozarugaz.pdf
    • https://uploads.strikinglycdn.com/files/9bcbf0d8-5a3d-4ac1-9201-fe00776a3db0/wafuxirefaguzawekije.pdf
    • https://uploads.strikinglycdn.com/files/2b084d31-3c5a-459a-ac02-d90af50d9c59/how_to_draw_a_girl_face_step_by_step_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/ed95e11a-89ef-4b49-8c6e-1b165bad8f00/sony_rm_vlz620.pdf
    • http://wepadigisita.pbworks.com/f/japji_sahib_paath_in_punjabi_written.pdf
    • http://pesivop.pbworks.com/f/95742522037.pdf
    • http://nilanom.pbworks.com/f/global_competitiveness_report_ranking_2019.pdf
    • https://uploads.strikinglycdn.com/files/7f592ca8-31a1-4457-a11b-8063f383a42f/jexasulubanobupugaje.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_off0000cc12.bin
1490e6d8d7c28030e9c74846854c73bb9f2b6d91ba96f6f409e70df884c4b7a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC12 4588 bytes
font_01_sfnt_off0000dbc5.bin
dacd672be2c77f23d12fbbafcf5a1928dcf2844616d846598291a45f42d3d6de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC5 9348 bytes

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