Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e4bee24c52cab4…

MALICIOUS

PDF

87.5 KB Created: 2021-09-18 09:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba3dc5ace8bd7a2f2a06e85bb6dda149 SHA-1: fbe8dc46bf2d42209dc0f475b7bf19162e94f860 SHA-256: c6e4bee24c52cab42ef72ba84114449858d7b73ff5259841ce949de0d429b0e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using these sites to host or link to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification, likely involving phishing or malware distribution via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=my+hero+academia+the+movie+heroes+rising+full
    • http://gelinyuanyi.com/upload_fck/file/2021-9-4/20210904131822360529.pdf
    • http://shipsupply.ru/userfiles/files/26250820353.pdf
    • https://ivantomanov.com/userfiles/file/wowud.pdf
    • http://architettoangeli.it/userfiles/files/81000910685.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed5662bc53---62764498259.pdf
    • https://soudureornementalelauziere.com/upload/editor/file/jafof.pdf
    • https://kcss.hu/korosi/userfiles/file/towewekevapekuw.pdf
    • http://clerus.hu/files/file/40120236900.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a1ef41326c91a0a65f3c2a1868b63bdc/girusopopafawo.pdf
    • http://joesservicecenternj.com/userfiles/files/25569099802.pdf
    • http://geriatriccarenewjersey.com/userfiles/files/zatebolokadoganojagorina.pdf
    • http://domoticasociale.it/immaginiNewsletter/file/12458632383.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/57o2fchqnmua9kcs824jq1071n/28135221689.pdf
    • http://antansconstructions.com/ckfinder/userfiles/files/dokoxipirarodabodawuzal.pdf
    • http://sitarofindiamd.com/userfiles/file/pupedilejalabopelemefo.pdf
    • http://tunesistudio.eu/userfiles/files/27477572592.pdf
    • http://salonorganica.ru/upload/files/43221254169.pdf
    • http://sjar-tech.com/uploadfile/file///2021090522463126.pdf
    • http://cen7dias.es/userfiles/files/64739055353.pdf
    • http://putzlappenborner.at/editor_up/negowikijazuzavakumerax.pdf
    • http://webbyshoe.com/fckeditor/userfiles/file/funapuguxapalugamew.pdf
    • https://noticky.net/akce/fotky/file/56193390838.pdf
    • http://onelove.cz/file/98743109725.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_off0000e4a1.bin
0ce22867920cf7896d5469ab7a794ec6629509f5e7013c9a4736ca0b8189faa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A1 11196 bytes
font_01_sfnt_off0000fe80.bin
ff8eeea998bfa5464619284344d5a45880ad8a3614652ef5fb2a7a41516b6d28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 21832 bytes
font_02_sfnt_off000137ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137AB 16792 bytes

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