Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7d0bf033c6d12d…

MALICIOUS

PDF

95.6 KB Created: 2021-08-15 02:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eb6c043bbe9c0147f91afb9c5f42d3d2 SHA-1: 190f49ecc5c9bba252b71fa2751546b7211d8a62 SHA-256: 0e7d0bf033c6d12dda08fdb6f6aa58d0e36b72670629b80b469c6dc27b3ccfdd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The presence of multiple links on potentially compromised infrastructure suggests an attempt to evade detection and deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cfe21d2d6---16925084519.pdf In PDF document text
    • https://alihuata.com/userfiles/file/xetazi.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/wagevozixulet.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d36d2e61f---sudoxibogotulogujo.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/o8jtekuj3oihp2536nggokc6u4/tuwimilumufebisudadob.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/83512372974.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/450237e75502fbb0b2adc4cfdd0848d6/mevoraraki.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/fudagevupewaruxorinofiwuw.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c95cbb1a7fe---fikatajagopazujeder.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/71057640965.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ddf956250a680edb5f331d5381c53002/majixuxogolubopopapu.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087a025ed0ed---35392855891.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/6ef0b531b179e51171d2ba281691094c/duzamovigafemego.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/64509583283.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/sezivizimanefelukaxivupar.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce42a3d557bbf9d402ab24e0525cec7e/tipelotalobitajuk.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3007f3e801---29848310151.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/18611106371.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/0d714f3b5f1435e8d07508bb79a1610c/dufiwexekedofuwenizemeluv.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/mapokifafebival.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161129333b5688---kabuvuvidu.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/53238194585.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/jizodujunewimufutepatado.pdfIn PDF document text
    • http://regmac.net/userfiles/files/mufat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=tres+fabricantes+de+biosPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11157 10524 bytes
SHA-256: 2d5b3d994e375cbaa47cc04ec5f5d6e54f5dbdb62619d6ade2237e603de11f7a
font_01_sfnt_off00012972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12972 18032 bytes
SHA-256: d5f2f04e330d7ba464994168c1cb0518f87ec0bbb4b6fde351044c31161f202d
font_02_sfnt_off0001571e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1571E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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