Malicious PDF — malware analysis report

Static analysis result for SHA-256 275ab959be6063f9…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 12:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: acd323f2030abe0bf47fbca826c83ee5 SHA-1: 2af8e8a7bfb636163ce0ca918c02184394fd6c12 SHA-256: 275ab959be6063f99fbcee78a7c89d086595e43929b1ab8fdda53d0e916b5cba
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier strongly indicates maliciousness, and the presence of link farms on disposable or compromised hosting suggests an intent to lure users to malicious sites. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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://coretry.ru/uplcv?utm_term=demon+slayer+mugen+train+duration
    • http://tartak-monis.pl/tartak/images/file/buxasoburipikuxadidumami.pdf
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/bijurefixa.pdf
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/pajokezaluzivadaxe.pdf
    • https://transport-vehicules.fr/userfiles/file/73865834580.pdf
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/55910893093.pdf
    • http://sziazsauto.com/uploads/files/sukagugebokezuwinafevulu.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161408ba0f2565---59370692038.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139db2b31bf2---89070672131.pdf
    • http://pc580.cn/upload_fck/file/2021-9-9/20210909224926173797.pdf
    • http://rracc.com/file_media/file_image/file/26621620148.pdf
    • https://hotelpancharatna.com/assets/userfiles/files/rosomutipuvituregukexaf.pdf
    • http://clinicaveterinariagussago.com/userfiles/files/nusimirirawapokaxeni.pdf
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/65726571897.pdf
    • https://hrmconsulting.biz/upload/files/maxepaguvinojalaroze.pdf
    • http://dtyxbpzx.com/filespath/files/20210908062912.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c9a4396904ed1a4b4d3c16a52c0abfae/91724909370.pdf
    • http://mueblesdepladur.es/1/userfiles/file/pemejalitozemuvitudilusu.pdf
    • http://cs-web-design.de/ablage/userfiles/files/vowoxajajod.pdf
    • http://zsmnowakowski.pl/userfiles/file/gemoxoxobez.pdf
    • http://yourbuilding.ru/userfiles/files/fetiwovogupuvorozo.pdf
    • http://cbcom.fr/ressource/site-image/files/54560307876.pdf
    • http://alituncer.net/userfiles/file/nawuvatolovusozukepigaje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA53 16792 bytes
font_01_sfnt_off0000f265.bin
785fc0d2a8af8ac7a6f6797ea6f70ec328dfa6d20c994970684bd3b1dc02f80b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF265 18876 bytes
font_02_sfnt_off0001238a.bin
7fe90bbe2f912b6627b21075ead4e04a4679973c13d6364ef1aff3a7805fee43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1238A 10804 bytes

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