Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d3cf78076cad5b…

MALICIOUS

PDF

84.7 KB Created: 2021-07-03 08:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 863459390932859d1569ae18d639fe87 SHA-1: d14cf9e27046493c63ccba0a0aca49ec709a3be9 SHA-256: c2d3cf78076cad5b0c3e3d092cabc5d34af677696ad2631e68ad665d443337d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites. These links likely serve to redirect users to phishing pages or download further malicious content, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/12381a642f023b1d16628b1c56618268/guvawitakolelasidenoru.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f07c6e230---mugiv.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c93733d022c---32804197591.pdf
    • http://smolensk-bakaleya.ru/userfiles/file/58361941221.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160de573f9deab---fafivowijolulagor.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/4e07227cb677cdeb4b2246369b1c953f/bafaliledupil.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/c70626d72c7090a69f14c240c2a99f5b/24617707978.pdf
    • http://motivationandmomentum.net/ci/userfiles/files/mapegixobalejekurubotozow.pdf
    • http://bronia.org/userfiles/file/51304668772.pdf
    • https://kuzeyilac.com/resimler/files/14704571277.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/rh7cjahh4kv3ee459cc57ejqp6/74542338297.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a9c1bfdc---letuwajarudigenerej.pdf
    • https://susta.vn/userfiles/file/popazusuxoxirosozu.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be88b8494bd---7647130194.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/28d15875f16830a82ca4db81a5b14ec2/vepinelavumexe.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acbc761041---mogubegisasipozuli.pdf
    • https://prospr.fr/ckfinder/userfiles/files/suremusax.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/7e4f519292c667db1027b580e754c5da/zenokudaxezu.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df3605d6235---funamil.pdf
    • https://aprilboya.com/userfiles/file/deturopolivipofonepobop.pdf
    • https://acrgroup.nl/userfiles/file/5419191864.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b350580adad---56287780108.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a8a092004---29778893096.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/c7998dd6bae27bc164b86113948eba63/62214723171.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=the+american+census
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8c.bin
f4fa4dd1083b5dc374e0bbcdc62761d33e1510e7207df02cbd36b6cd337e6711		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 10292 bytes
font_01_sfnt_off00010176.bin
8987190ce842dec1ff5320bd4d156c8802feebd81fc7a677698a9ce75a49e0b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10176 16960 bytes
font_02_sfnt_off00012dc2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC2 16792 bytes

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