Malicious PDF — malware analysis report

Static analysis result for SHA-256 9492ff1c84258efc…

MALICIOUS

PDF

117.0 KB Created: 2021-06-25 21:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c00d606cd1a6661c7283a4d8ee67a937 SHA-1: 3dc6479fd61e6d6187a5ae0e43b8c2a21707ca74 SHA-256: 9492ff1c84258efca6e0e203ec61e3a1a8faa5b204182ddb8c2d0532f1aac755
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://kientrucnhacuagio.com/upload/files/toraza.pdf
    • https://bharatbiodiesel.com/userfiles/file/fadiwuviniv.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd4c4dabe0---riwofofebovaledeni.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-6-24/20210624075720798064.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078819b1f558---21434245482.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab609360a---pukevevisuwetepiwi.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/f65e80f8cd95514de591921f69ed3bfe/segoxokitukixif.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/e53e42a5dcb35672aa739430235c32d7/golanoxorujopadivutadebil.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608da0399549d---lavimugepavamukow.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d7578c484---5012166373.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/996c01be57ae3f9dc5d5149f691ae39f/karozew.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a97565c159---75996714644.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160adceda8f2d2---mofaxuviruri.pdf
    • http://lukinserv.hu/file/mafajunozuxonopi.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c9d91069e4ca83ce4b6414bec8ba2ce5/79435218177.pdf
    • http://srividyaastrology.com/userfiles/file/37912176495.pdf
    • https://agrimal.pl/userfiles/file/88157107268.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/0df49b60691d794016cc0472ff758095/83906516980.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072f25ce02de---bifovuzomikugi.pdf
    • https://bitree.ru/ckfinder/userfiles/files/mizarodekixiwemudosuxu.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ksq67q7unvtu66abm7nom601u6/tirojozolodutezupaporafe.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ca30548544d---7326401420.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c8db45bfacb7dc264da32952487ded83/jujutananofujafilapefo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=oceans+and+fisheries
    • 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_off00016bd0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16BD0 16792 bytes
font_01_sfnt_off000183e7.bin
1718739c69ecb3b70cd73039fbc4dd540c0ecc22e2e760c76d4eb29d9aef3333
pdf-font-stream PDF embedded font (sfnt) at offset 0x183E7 10332 bytes
font_02_sfnt_off00019b25.bin
66f12cbeb4e607bc59ea05e6b470fd0ba1543d0b9e2f3808d2cb28542d19a62d
pdf-font-stream PDF embedded font (sfnt) at offset 0x19B25 16912 bytes