Malicious PDF — malware analysis report

Static analysis result for SHA-256 da10e316f4f98301…

MALICIOUS

PDF

92.1 KB Created: 2021-06-29 20:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d079656366973a75bc1736d5e4d91304 SHA-1: 00d341798ec726855bfc7a5c8765cc7a31f9b36d SHA-256: da10e316f4f983016018cf3e251abcd3d2ce2c243c2abf4f8d9e4094fb85588f
164 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 and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://korzayithalat.com/spot/admin/fckeditor/userfiles/file/50421850431.pdf
    • http://abwingsbuffalo.com/uploads/files/51865353336.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/640d8224e299c960d300d1010a622383/vokameporojivavofozopodi.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b66d18ca79---xuwomumoranaluletubusama.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609858a55b5ca---63969470637.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c1579cfb0---vexexadebipixorofolip.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/6d7089ea09d2a38ad363d628767ec2ca/mipixi.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/0fdc8c1272ebbb68e5991c93eb9780c1/56539499192.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/0e7c2933aeeb68d77cd840bad2b0b8bc/33566330147.pdf
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/42510070995.pdf
    • http://tipkeo.com/js/ckfinder/userfiles/files/29710759346.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735acdc113b---71287389804.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/84344f22673ea0ce1e5b659cc098b5b7/fepegamuvijejil.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c158f1b853f---raxewalawoliril.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d188bbd4cf---kuzexapagurafukakamam.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/e3ed67ef0bc15850d209075f0464107f/35411548806.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afac8c4ffde---387423111.pdf
    • http://asiavent.com/UserFiles/file///26442899637.pdf
    • http://esistore.de/userfiles/file/tojunogemefez.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160955aab606cf---45069380121.pdf
    • https://werbemittelag.ch/userfiles/files/23519077085.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c601bc2c98---vekijodox.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ice+age+movie+watch+online+free
    • 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_off0000fab6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 16792 bytes
font_01_sfnt_off000112cd.bin
a77c622bc22138c8b68d8ef45512d330df0eef5d349c44ff776187e28c8e394f
pdf-font-stream PDF embedded font (sfnt) at offset 0x112CD 10720 bytes
font_02_sfnt_off00012b3e.bin
236a2ae0495be836536998a52453ea4d86455ff917696853caffd2b925431d6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3E 2044 bytes
font_03_sfnt_off00013485.bin
78068f9dcc7a4e6ca2c3dc37f0d7d932d17166448302b44f10e94e749ec24235
pdf-font-stream PDF embedded font (sfnt) at offset 0x13485 17628 bytes