Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2470449e1634df…

MALICIOUS

PDF

73.2 KB Created: 2021-09-26 14:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f58128e120301267575a2c6bdc627ae SHA-1: 92da80e423d3ac28a8e98171e30736f66787358f SHA-256: dd2470449e1634df65a3ce8f855448923156257f064b077eb0fd2805ac10906e
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms points towards an attempt to exploit user trust by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://gabortech.com/admin/file/40162867152.pdf
    • http://gowowdeli.com/uploads/files/sitafozopa.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/f9e9c77b22c3d7347ca324a6f9d26679/nafuxufubonatelofa.pdf
    • http://cachnhietwin.com/luutru/files/nofolusepukopefanaja.pdf
    • https://zenithoverseas.com/assets/userfiles/files/28076451146.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161417c898964f---xozosu.pdf
    • https://truonggiangcompany.com/userfiles/file/50213716987.pdf
    • http://80tner.friend-match.com/upload/files/91280881801.pdf
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/nowijite.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/m8q5ps6kshqtvogq5scme47ii6/lugenu.pdf
    • http://lumieye.com/userData/ebizro_board/file/jufokajotabaroko.pdf
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68588063842.pdf
    • http://lizhechem.com/upload/files/25300083265.pdf
    • https://casabresciani.it/uploads/file/nudenavuwoneze.pdf
    • http://anquocrealty.com/uploads/image/files/vijifoxusu.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161488956736dc---kajunososazevujijilavo.pdf
    • https://floridahouselottery.com/test/userfiles/file/difodulal.pdf
    • https://premiersuli.hu/files/files/telifunuxeled.pdf
    • https://ms2oke.com/contents/files/puvifilakapazajagibi.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369a6e95773---80830740309.pdf
    • http://gamecoast.by/uploads/files/jeborigud.pdf
    • https://jocafoto.com/fotos/file/70411878718.pdf
    • http://techsystem.gr/data/uploads/ckeditor/files/29751266430.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=grow+younger+live+longer+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_off0000b536.bin
c58477118af94fb598df22efc554009f2716dd3de0229f2277ebea144dc8adea
pdf-font-stream PDF embedded font (sfnt) at offset 0xB536 10648 bytes
font_01_sfnt_off0000cd81.bin
d99a290af7c042a3d17f12a3fea186731668d269d1df5c2e4d8991cbdd997f59
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD81 18700 bytes
font_02_sfnt_off0000fdd6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD6 16792 bytes