Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eaddf4ca54dbb76…

MALICIOUS

PDF

87.1 KB Created: 2021-09-04 11:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a7d2e6e1d0a82a8f8c84b642e641100d SHA-1: bc8c6c82b1cdebaf8aec15761f88559485657564 SHA-256: 6eaddf4ca54dbb76c8ca9471c1806f44dd299bc08896e527b8aefab0b11ebbe8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and link farms pointing to compromised WordPress sites and other domains, suggesting it is used to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://laborke.ru/uplcv?utm_term=catia+v5+part+modelling+tutorial+pdf PDF link annotation
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/2cc8f40a5f24fa213ae44346730926ad/jetuduzano.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/13563808621.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/64945769470.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aab82912dd4---lorusixedusufuxa.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/77934573390.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/furigi.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ea6e28d9a11e528eee1cd710332c5082/jonasujirutirami.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/15728818391.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/c5a2741b97825e82549c4169d48f008e/lufexegimebe.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/53378573794.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aec2636f5f4---xedute.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2e52cb53a---nagudumeg.pdfIn PDF document text
    • http://www.heksan.com.pl/file/jikebexevujobolup.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/6f33ac577fc7a5658c68bd80c0b5d2d7/11567527997.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/25614929861.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/vuguwusoselemejoren.pdfIn PDF document text
    • http://africareview.in/userfiles/file/nifewojajimutujo.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/favuforegatolenadimekad.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07b51e008---33519990383.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6bb38c1568d1af8346426782d0c8ded3/rugimaxejewaxesafomurabud.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16071d5652223c---risite.pdfIn PDF document text
    • 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_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 19288 bytes
SHA-256: f7860e29836d06cac4c7622320db4a67d848daf997c7510cb4c9c18f37108499
font_01_sfnt_off00011d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D46 11004 bytes
SHA-256: f7dbfd31fb5b5802b01a97ebebe2c139073e25711646d13ddb85ab03c112e99d
font_02_sfnt_off000136bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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