Malicious PDF — malware analysis report

Static analysis result for SHA-256 df689dcb99e60e25…

MALICIOUS

PDF

134.3 KB Created: 2021-06-27 22:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f928e9753b632bd7f44c6763fb3ee26e SHA-1: e98db72197bc28de19174614a875d044bbfc695d SHA-256: df689dcb99e60e25048550b67a73b5c49086cbc5770e27714e25ea9a4150e2ec
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick the user into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests this intent, and the ClamAV detection confirms its malicious nature. No scripts were extracted, but the structure and heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://aarogyamedico.com/userfiles/file/6391760100.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b899ecd36b6---wowudij.pdf
    • http://gelateriacool.it/userfiles/files/28338381717.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ed7c32984c1575f6613a7ae180bc8815/sogoduwopuxoxupa.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/g3l2kkpvfpu2tapd5a4g13e7gg/42145366263.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/8v9h32qh0j0lj8r67vmc5c6eu1/16046839875.pdf
    • http://sicilalluminio.it/userfiles/files/gaxoxavorabodegugajusenox.pdf
    • http://vivaibonomo.it/userfiles/files/90998532487.pdf
    • http://vce34.ru/attachments/file/kajos.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc82a817ef---48801763955.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ac7a0ad40---sivinepekekakodipatomu.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b711ddd308f---74700457051.pdf
    • http://sbnjl.com/userfiles/files/bewuxezu.pdf
    • http://odpadykj.cz/UserFiles/File/tagifafikidimijewabejiloz.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904da72994f---gufokakemejogateleg.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1eef9ab4ff---2852587442.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb32c46de---bedopedibovekisid.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607187d899828---kitofukaxowekadagefap.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/137cc4f0e40119cfd025aeda5cb68102/totozazopexade.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/90b6f0155afdc0bb44a912441e5cf300/panuma.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607585b04267b---73424437325.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5j67b7666bucufk4uvg3d47fh7/dozilakoziwixomarin.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/63080b9e73212298f49616f977bc2ad8/pizazeguvi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=the+martian+movie+worksheet+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://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_off0001a489.bin
bc6da30f404c086a2644c4ccb52148ef169643f4b327e194aee1e47315a8be0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A489 10924 bytes
font_01_sfnt_off0001bdba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDBA 16792 bytes
font_02_sfnt_off0001d5cc.bin
a9713945f6f9cf45a41e40bc738a6a8f53f665e9dd24999a758c9cf6444a7cd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5CC 21452 bytes