Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e0533c6bec2ad7…

MALICIOUS

PDF

83.7 KB Created: 2021-07-03 16:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0b24361b9299973d307b30a3bd2fc7e0 SHA-1: 36706c706ffa4f5de10f348d608058389f83190e SHA-256: c9e0533c6bec2ad7ecd7773b76105301adc3f351b4378cc3b007fe6523f16a7b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to distribute malware or lead to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a852110f79---42750243278.pdf In PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071a57e97109---rogukekosorepuxufozututi.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/waxopanokowawinozase.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/74217110237.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a2b58c363---76636075807.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/6a35a3fa91d163c1290f53c276f722b2/wujibosixefapuzafovo.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/42604832676.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16093b82960661---tevafom.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077787de3b17---botepafebatirifewubepes.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/fenaxekopo.pdfIn PDF document text
    • http://01host.ru/userfiles/files/lojitidebekar.pdfIn PDF document text
    • http://firegallery.ru/img/upload/19388446807.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607cebb7e1bfd---kitopag.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/2a5084cac4b6caa911e58481cc757b76/nasiverena.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/3461d5588a0d05f894f8a30f04743b87/909087548.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085eaaaec3ab---poviripada.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/d9c179e02a0d89a4a8b2ff69e920e1dc/69787984547.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/led20apm736pee5fu5bghga3am/davimadinirelir.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/324109642a3cd02badd03b66bdf0b89c/59181239748.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/90368897324.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/8980f76ae7a35bf5efa4843f3bf6139f/norelaxixonam.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/6598f62f360e1326c6e24779d8003d1e/vadoxab.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/nolofedebuxutoz.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/suncbkucrm181vpduf96rjrdh6/54131493301.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d30690eb30---29442943561.pdfIn PDF document text
    • http://industrialdevices.in/uploads/49077307180.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/260f3b712aa990d81a19c0bf65932ad9/zosasudinisofogavemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=efficacious+novena+to+the+sacred+heart+of+jesusPDF link annotation
    • 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_off0000e271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 16900 bytes
SHA-256: 93f2b9d63e4cbb8e67886957f2d06f287036ebb0ba865c2567cdac2ceb4f7375
font_01_sfnt_off00010e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 10808 bytes
SHA-256: 465e794d05285598eed46a9dbecc158ad0f294cc83012ca898f4fee25083a3d4
font_02_sfnt_off00012723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12723 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1