Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b2d68c60d25cf0…

MALICIOUS

PDF

89.7 KB Created: 2021-08-30 10:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce4bd9d9331d142ed8af15c29e88d564 SHA-1: 8bde0340dd1d91b8b9b776f37525c2a6f29ea99a SHA-256: 28b2d68c60d25cf0ed7af419026f92a8e62db2b263b5207ead9b867cc521dd54
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests it may be used to redirect the user or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://coretry.ru/uplcv?utm_term=marathi+numbers+1+to+10+in+english
    • http://www.majbrno.cz/uploads/files/galopisewefozoli.pdf
    • http://chrisdepanneservices.fr/Sites/cds/files/97431053154.pdf
    • http://botosani.ro/img/uploads/file/suxovumifoxerobaze.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fbc4d4db7e9---kebosenekevedirokofa.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/2222aba721bc35aea987f356f50b1fa2/95293293939.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/gcl89uid6ppjb1h80e6toj23nk/kuguk.pdf
    • http://fly.no1-yes.com/userfiles/file/80429786447.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/c13df6d9407dcdad6ac0ae21a768fe03/7034802858.pdf
    • https://ibexquimica.com.br/ckfinder/userfiles/files/xonofal.pdf
    • http://fitviewer.biz/files/file/vanojubijupapu.pdf
    • https://pasarangroup1.com/contents//files/xopoxezupowimal.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805f0dbf836---76381097931.pdf
    • http://rogersdesignhouse.com/uploads/files/lefebitisinexiruruti.pdf
    • http://dungcubepgiangtrinh.com/webroot/img/files/nulekudipibeki.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984013c9391---76603179350.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/d2c2c545dbb873d376ee67b9c93e9cae/30482764246.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b627af3ae92---55451524711.pdf
    • http://nguyenquangcomputer.com/upload/ck/files/lazalimupejinegulixope.pdf
    • http://bm-shower.com/userfiles/files/dafuxubazigozeboxezimalo.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091ab3ea5803---58944541295.pdf
    • http://sacmacbook.net/userfiles/file/tavos.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/lq7861ngsivj91q86683uaoguu/mixigufe.pdf
    • http://toyotaprius-custom.com/js/upload/files/1323106348.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/edcd4ef428503dc5b57d104edf0b26ec/luvegosawedewuvito.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/jesekikademanito.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161142a9e3df93---misinogojekifog.pdf
    • 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_off0000d7d3.bin
999a9c9064151f60f8623d0f3ecbbfe703ab27282dd9426be2ad2ff580f72625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D3 21008 bytes
font_01_sfnt_off00010ecd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 16792 bytes
font_02_sfnt_off000126e4.bin
3989d4bebf4c11b32c7e8863b1fb15033765705081650cafc60edbc7d69d35e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126E4 10960 bytes
font_03_sfnt_off00014026.bin
071bac7a3a90310621307d68123817e30fba7c89f9e5021c4391eb43bd8b9137		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14026 16132 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.