Malicious PDF — malware analysis report

Static analysis result for SHA-256 6448a80fd27a308b…

MALICIOUS

PDF

80.6 KB Created: 2021-09-05 00:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d348622282c328ac880862541513476 SHA-1: 95a042cde751b886fbff9cdda7c6f7a231f7dc71 SHA-256: 6448a80fd27a308bb2babba70870d451c32650cd574829c1aa108793bc549e9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect the user to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://baxsporthorses.com/userfiles/file/sulovafawevomanujikuvaj.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb5ad6afd3---natedunexedexizo.pdf
    • https://mangalargalux.com.br/ckfinder/userfiles/files/vagusixejitet.pdf
    • http://unicaconsultoriarh.com/images/files/mijodubixuzufebowuvi.pdf
    • http://tvcsoltau.de/userfiles/file/32640439338.pdf
    • http://vlajkylevne.cz/UserFiles/File/66509386018.pdf
    • https://2acontractor.it/images/file/bomup.pdf
    • https://nepalipublisher.com/ckfinder/userfiles/files/96195761890.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/040c1479c63870bad03d3811fd20759a/pumibajoguxigaxov.pdf
    • http://alfadent-volg.ru/images_uploads/files/gusim.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/sldi49ckksvo7ihk9mv7okr1qt/bujemo.pdf
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/guvarobojozas.pdf
    • http://droneducational.com/admin/userfiles/file/wuwujoferufixivumuxep.pdf
    • http://dental-forum.ru/userfiles/file/80935635091.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d78ea0b395f---9766273969.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c715f53c1e9b2569e4e60f107ab6da71/ferozipisijivun.pdf
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/nokobaxuliri.pdf
    • http://papianiarch.it/userfiles/files/tezonujujobazabubabazodak.pdf
    • https://ipekyolumedya.com/resim_galeri/file/pavelenofuzosasoviliged.pdf
    • http://ruresept.ru/files/file/28048479892.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086679b8e5e2---forevuzogowi.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608faac5ed83c---99431392013.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bf46457498b67f9fcf3639b631f41c22/37373073506.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c7983bfda---15430380630.pdf
    • http://fdscience.com/UPFILE/userfiles/files/vimovagiwivexefuzejabeba.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=fight+club+pdf+online
    • 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_off0000dade.bin
d1dff2e992c5c28306a7cb66411c44cb81ca14dd0c0ca3197f3f9d540e3de27f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDADE 16228 bytes
font_01_sfnt_off000104e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 16792 bytes
font_02_sfnt_off00011d00.bin
a350402084799ec56b51513799aa588f3e35db9bc61fcba01ca00b1f12477f8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D00 10684 bytes