Malicious PDF — malware analysis report

Static analysis result for SHA-256 339d9eab106612b4…

MALICIOUS

PDF

86.2 KB Created: 2021-06-26 11:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 326c5daa3bd0492f4f7b13eaf3b34203 SHA-1: 0086d09c4a099c97e5221976e3581e5b4ea42f38 SHA-256: 339d9eab106612b43528764cd65824ddd24f09e29b9d43033dfc5f51ef7ef215
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised websites and disposable hosting, indicating a likely phishing or malware distribution scheme. The PDF's structure suggests it's a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://anatolianlgs.com/userfiles/file/museduvubi.pdf
    • http://thanuyentea.com/ckfinder/userfiles/files/kaxuxukuvivis.pdf
    • http://nousgarage.com/userfiles/file/rumafetiko.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf25569998b---63201720124.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4c94afd05---65927723250.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/fddktgd835u7vnevisgo059r7n/sufawijusaz.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/13dce212a6e95aec6f842ccaa2a61d2f/2890440296.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3a8098bd6087f9e16d76e31e759a6d5a/337537433.pdf
    • https://pui-vital.ro/msg_media/file/71060011070.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbeb3d97474---fajewobomemasawupedogisi.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c27cac28079---71438786156.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/c1cfc14dad7b6ab6e1b86edfe51e1205/jaxeku.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e2983b76f---fagogipuluxapezikutig.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607723f1a7b37---malaridavibetemoriba.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/18631122893.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160712ed00083e---kosupanetip.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/tsl8j1jdo162sc7215i48a4ep5/dabir.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7ce79032e---15578147808.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1e6919dd7f7d1f857df6927efcdab189/2109167961.pdf
    • http://beiwendq.com//data/attachment/file/9302852206.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160809e03c750b---81118211883.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e61947c4ca---zerevoludolazapuxabob.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/96f25211330cb15c2f73944388f7c741/19307901519.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=java+create+array+of+objects
    • 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_off0000ef45.bin
e4813c7ea116272b3530dabb7baaeb49cb1d5a53c5adf27d008435d22d408a34
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 16864 bytes
font_01_sfnt_off00011b91.bin
75f5374c571a363af749f06fe486ed3c52cac98a56cb887c842f02214efd4c14
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B91 10528 bytes
font_02_sfnt_off000133cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133CB 16792 bytes