Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b89a7db03dd4ad…

MALICIOUS

PDF

87.9 KB Created: 2021-07-04 21:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16657071b613c654e6e42733a5e120ac SHA-1: f6b3bf4aa0d4a2492f1b2fd092da38b6711a51aa SHA-256: e2b89a7db03dd4ad3a44ab91218e76d2458846b9523da7fc8f0b1c4913de1dda
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised WordPress installations and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://asja-doll.ru/userfiles/file/sazuzejoluvegulisas.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/qmvh7jvivs93386kjtqndb6tj5/vamagekonowotiwevusira.pdf
    • http://generale-bureautique.fr/gdb/files/file/zitepesijupose.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b79b8e48a062e24bbf074b49303bfbcc/95470812863.pdf
    • http://btc-ltd.com/upload/file/60767153137.pdf
    • http://ricarda-allegra.de/userfiles/file/4193873656.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a4c56ae9a---kemuwitegufotepapaki.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/d0fad887d28bd9cf55ce8ccf1833feaf/vewenulonavemobujolomim.pdf
    • https://nadinerogger.ch/userfiles/files/85933845586.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b28fa8709---nosaletunoradonidake.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086e16943d23---78164925852.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/kodisur.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/cba60a1ad24ef15dbdb09344582c8ea8/43303445294.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d0e36d833---musazuguxe.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7c622ca1a---18342480556.pdf
    • https://sport-jicin.cz/dokumenty/sasemiwo.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988783c3571---samobefamakowonipitit.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/08ddc81a42c6fadf8e36120c791e2189/nuvakitalosuxexel.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160788d242ac3b---nakafazilapes.pdf
    • https://alshamiltrading.com/alshamilfiles/file/29347632308.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da88f26ef22---zutasolore.pdf
    • http://sbs-group.co/userfiles/files/66384134620.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=business+today+magazine+pdf+free+download
    • 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_off0000f463.bin
2d00fdd544d300309d2e4d01902f95a78af64d480599e18160d54610af851bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 11252 bytes
font_01_sfnt_off00010eb9.bin
0378a68b65b970c730149dc6eec55b49d01c836e8936034c072de76616aa0164
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB9 16820 bytes
font_02_sfnt_off00013a6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6E 16792 bytes