Malicious PDF — malware analysis report

Static analysis result for SHA-256 9def3660dc224098…

MALICIOUS

PDF

84.3 KB Created: 2021-06-30 00:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4998dcca940dfc551ce2e00ddf3b53c SHA-1: a0686898ecd0d7f7b67d4294a765432866f3afcf SHA-256: 9def3660dc224098b7bb1c0a40300754ef55c798d7f6049b0d4a58ee218ac269
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites or disposable hosting, suggesting it's used for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://oniceh.ru/uplcv?utm_term=best+foods+for+you
    • http://inwallendorf.de/userfiles/file/febinemisitezomalutudebuk.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/c54359539a5e12a7387de17a0ff9b7cb/69992987960.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/320864c61e72da012516ef4cd360d787/nakazesede.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/b1jh4go1879inq4ro4il0u40h1/bagudenikugini.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/64oc7a3guc5m11gq2ejj0fm807/lejek.pdf
    • http://pogservice.ru/userfiles/file/monatiwunewuxeb.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/7543a17572534ccc926e8072c0517954/toxajaranigitusa.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/dn14b7l3v0ogcmobb1t8hdgu71/94163570946.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e425315261---devijuwakabo.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba6867d2b---95253512416.pdf
    • http://123podkrovie.sk/editor_uploads/files/buwidufukisa.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160adb7d32d593---kabazumipumuwivukozajopev.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160927a4ddab7d---88460334787.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850df0f322a---61943760209.pdf
    • https://ptogel2.com/contents//files/pixabalekemotutumitijugo.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812d0f6982b---27893546218.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608719cc2e36a---durepovulogupisamoxawa.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a92347358b---43787835139.pdf
    • http://fmi.lu/userfiles/files/99055823005.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/910235d21dea278bf6b8573bd16afdf3/69542708267.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779a6a074e9---mipedatubobazibeleme.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2b1db1ab7---42190237174.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085213b22a7b---70494428486.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eececada6---tutibezozivitozekadudazon.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_off0000e858.bin
e88f76858089fc4a0566379234a0903b84f4047e035f449c38bb9517d42a219b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 17260 bytes
font_01_sfnt_off000115c1.bin
8ac4ea19c416ebb4318e19ff81ee218c1531a87c0944fa3120080a31818a062e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115C1 10212 bytes
font_02_sfnt_off00012ce1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE1 16792 bytes

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