Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fed36ed622dc12…

MALICIOUS

PDF

89.6 KB Created: 2021-06-29 01:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b9396d5b52fba9703ca5b195997a3476 SHA-1: bb29624168f04778504ec7fdc3368870b0bc2df6 SHA-256: 08fed36ed622dc12e13b1ccda8289cfb4a1e1a14f8db9e087c0db00821c4b58f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to redirect users to malicious content. The presence of external URI heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/15551c7c72732d67485485d2d7194efd/jolalif.pdf
    • https://suma.ca/upload/editor/file/84479123290.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/87180796632.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d850fdb9e9f---71870892357.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/d181bda2ab1a3e945390435c2f36726c/95643502643.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/e463bbd7cabd0a68d8b30c7fd1f5ffe2/kidogoguna.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160710cdb4b000---nuzireginavovasasoxa.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16081602356bf2---mazadelerovojozi.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/gd459tkbroohdvs7lte7qa09sq/77687506176.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/2b4f976fb57058d5fa264a90756467d5/nibovakas.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae8cc58b03---tabaf.pdf
    • http://liyangah.com/Upload/file/70795275083.pdf
    • http://pileshoppen.dk/userfiles/file/devasezoximaxujemuxor.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904518c0900---jusuvokuz.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/37337223623.pdf
    • https://xn--interpeas-r6a.es/upload/files/pizabagizege.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/6ca53a489650237b1cc062164e764a00/27525859205.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/98f1c1a09ebab5bea057bacc4c3c1a0c/suwux.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf1840bd03---68682115529.pdf
    • http://interwork.sk/userfiles/file/34629312799.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3c540b4c0---zaperagigagukanugafavo.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d21aaddf485---gorisap.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/kelejemazabafifusaxa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=donghan+produce+101
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc1.bin
16834f4e65e521e0f950cd35a4e9a1c4c0ab510cd7b805b5ee3df80c96dad5e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC1 2148 bytes
font_01_sfnt_off0000e974.bin
da0463ab26a4deeb52936a3dd94338d0cfd89b7e4efd25395725b642167f7539
pdf-font-stream PDF embedded font (sfnt) at offset 0xE974 10664 bytes
font_02_sfnt_off0001019b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 16792 bytes
font_03_sfnt_off000119ad.bin
977394a62fde2be4300b1665adf0384a46ff36c5ab6b0ce342309473fd5e336a
pdf-font-stream PDF embedded font (sfnt) at offset 0x119AD 24708 bytes