Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d063e2bbaddecea…

MALICIOUS

PDF

79.1 KB Created: 2021-09-12 10:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d4b95bea89288180d9874c7da4b64ab SHA-1: b68c71bf94b565bdabfdc91a1d0dc7ae9ffea530 SHA-256: 6d063e2bbaddeceadba511006482e2e76bf7627c53254c6715694d2cb6495c1c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple links on compromised CMS uploads and the use of UTM parameters suggest an attempt to lure users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://quangphong.vn/uploads/image/files/teduropupubata.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16131f44c4babb---mulikavalefifugileguk.pdf
    • https://totalsewa.com/userfiles/file/lenadurib.pdf
    • http://agmapure.com/upload/files/wewena.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132612225e57---motigedozivajogibo.pdf
    • https://vrindaindia.com/php/joseph/uploads/file/luvuw.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c7564e710---zimuziwizi.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1613825c377882---70466795258.pdf
    • https://ddtoyz.com/ckfinder/userfiles/files/xonuti.pdf
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/69128142717.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132d7a79d659---96282241761.pdf
    • http://thegioimercedes.com/upload/files/wavuzefepibamupaxurowizof.pdf
    • http://capesociety.ca/uploads/files/wegojibizafapitej.pdf
    • http://cathugo-yachts.de/res/wysiwyg/file/47436931711.pdf
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/fejerogivej.pdf
    • http://salman-is.com/userfiles/file/31385486092.pdf
    • https://preciseenergygroup.com/media/nadiwufiwej.pdf
    • http://bluecars.pl/userfiles/file/magopa.pdf
    • http://cartopack.be/Images/file/43271816913.pdf
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mubeb.pdf
    • https://hippodrome-compiegne.fr/www/uploads/file/manudijexi.pdf
    • https://restaurant-kamkok.fr/img/Data/file/xafode.pdf
    • https://aglogistics-bo.net/userfiles/file/ginilupozusuzafibuvosin.pdf
    • http://weilandensemble.nl/ckfinder/userfiles/files/zaxewusupixuwenasasuka.pdf
    • http://baoveantam.org/upload/files/fexejoxuxevobep.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=programming+language+used+in+android+studio
    • 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_off0000cfdd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDD 16792 bytes
font_01_sfnt_off0000e7ef.bin
8aa3234d93007f1841e1ade69402bcc782169e5e8666867d04002f6ab41f40f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 17820 bytes
font_02_sfnt_off000115fd.bin
8539809edb6f58814e032a433a4ce66945f346a7d77fa8c6d419a44cdfef1b80
pdf-font-stream PDF embedded font (sfnt) at offset 0x115FD 10692 bytes