Malicious PDF — malware analysis report

Static analysis result for SHA-256 0747be58c3d574a0…

MALICIOUS

PDF

89.0 KB Created: 2021-06-26 07:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77e797aa6a7813939092db5a5218ef6a SHA-1: a80e04483668bf184e89e164aeaa25e246fe614d SHA-256: 0747be58c3d574a0d70cb88985681961520956af3835bab1e7c8ada02510857a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, facilitating redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://alohatoypoodles.com/clients/1/11/1122824db0f83c9e74cf39311881f217/File/42259287445.pdf
    • http://mamnonlittlesun.com/upload/files/gudewexolotuza.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d55177c1d16---79747085826.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/tcsprbdevr14sm2mlqi4b47acj/lewebatuxuxuve.pdf
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/vigeralarugukobenoba.pdf
    • http://proxima-design.cz/files/file/79252304377.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607489c5a28f2---35215695682.pdf
    • http://amandatravel.com/userfiles/file/18687886832.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/iacdghve7nt5pkv9kk4mo255l1/tewetegobolaximokanupu.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8db379b75---16469894656.pdf
    • http://elementsgogreen.com/userfiles/file/62683874665.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16077b884baa87---guwidib.pdf
    • http://alemotta.com/resources/original/file/suropulavabituvobukepo.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608170d5269de---94946289128.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/93ae8de32520dafa201a9b663f97006b/44630108984.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a009ec1b86f---14931003950.pdf
    • https://psychologgia.pl/Upload/file/86708724167.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/rgujqn2ivmajnsdob93dsmbpq5/koduxegivavugife.pdf
    • http://thanhlapcongtykiengiang.com/upload/ck/files/39538445302.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fccc443f2---22640061957.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/1qsnso02u1ucrg7huttp6s9vu4/19217439886.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0fb62719e---fevogemogukotadegolinuv.pdf
    • http://thingsantiquesla.com/userfiles/files/80276372382.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=isolation+of+bacteria+from+soil+by+serial+dilution+method+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_off0000f6b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B6 16792 bytes
font_01_sfnt_off00010ec8.bin
695cef199ca55cc9d79949514d6f9b219c5f8c3df0accea4b1d0f72d59b544ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC8 17452 bytes
font_02_sfnt_off00013c99.bin
9860418488c07c2caa591e763cbdd084e9e271b3d5f5aa2a48b825e02f0ea0a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C99 11188 bytes