Malicious PDF — malware analysis report

Static analysis result for SHA-256 de214dcaf95fc37f…

MALICIOUS

PDF

112.4 KB Created: 2021-07-06 01:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1bf4865a649b1e4e0f2f9e0992e499de SHA-1: aa2af526084f9c3f89b86d475c1151f4f3d5b9bf SHA-256: de214dcaf95fc37fe36871334c147d4f3f5b7b473e3143e72855da02f9aba91a
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 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. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://gulfcoolcontracting.com/uploads/userfiles/file/file/laxoro.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d55e74fe1a---99128748223.pdf
    • http://cosmic-kino.ru/sadm_files/54455340644.pdf
    • http://apartmaji-zunicmile.com/uporabnik/file/fukuveza.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b6b2cecb3edbb2d369c1b809192f8f00/bemaxakudefitomes.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160991cd6ad605---duzoxijenobegak.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a4139c558f9---livuxu.pdf
    • http://grawerlik.pl/userfiles/file/34734297778.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/rclrbfepbm3ms6leteajurn0k1/jumurojenulapivo.pdf
    • http://marketypik.pl/zdjecia/fck/file/18917717477.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/nuen5qriklp1niblm9benn1161/77112294731.pdf
    • http://videofilm-tv.ru/content/File/mowasowivinawugovubi.pdf
    • http://otoozevran.com/resimler/files/86073585379.pdf
    • http://joewhitefamilysite.com/clients/59967/File/lesufemufux.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ee05ef35d8b48a3fb04771f34f39003d/78213524654.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbcf30b950---nafudijidalesofutebu.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ik6qbku0krnqv2epvi0s80kif6/kifuvisewigejopupepum.pdf
    • https://zionapostolicministries.org/uploads/file/pafeb.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/a1ce1012b077eebea5375ca1288f6a2c/rixejifokeb.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d99137e8ed---4401362365.pdf
    • http://profitoolinfo.ru/ckfinder/userfiles/files/77962644959.pdf
    • http://inglewoodreunion.com/clients/68690/File/63740093320.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8bb27d2ff---bokazemiwerigoloxuxufutem.pdf
    • http://movitecnic.com/ressource/site-image/files/61235657044.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=salmonellosis+in+poultry+post+mortem
    • 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_off00015823.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15823 16792 bytes
font_01_sfnt_off00017035.bin
38674f72ffdf5ff79e48d87d84e2b741ce03d965fe4e3df84198e8c6d5f93846
pdf-font-stream PDF embedded font (sfnt) at offset 0x17035 16600 bytes
font_02_sfnt_off00019b75.bin
310f24fbfb5ea21b40ab0367569fe1cbed85a9ea94937530f9ec04eabb76e81e
pdf-font-stream PDF embedded font (sfnt) at offset 0x19B75 10704 bytes