Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ccf190996fbbb73…

MALICIOUS

PDF

93.4 KB Created: 2021-07-05 01:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ca0daeaea2bd8eb23272f0be31618a2 SHA-1: 919355215892d765e6484b70c486279eaf5f0061 SHA-256: 9ccf190996fbbb7306ff44839b0e7546c52f1f891167fd5dcbb05763fd390444
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4500d09e3d59956a4d9968208ff8d7da/wixafipisufipuraxewur.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f67de08d32---lejivadewerinukokokixi.pdf
    • https://lemanssrl.it/file/26781151484.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/hr7smkcmrqop8l4eri1nlsi7k0/67409919952.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/6a8069c04bce95bc77cff90c0c48b15c/96584402858.pdf
    • https://autotronics.vn/userfiles/file/63740421116.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b26bf2636---38387625231.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/f8ail8uae7l0qsne67tu4otq3h/wafifegu.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828a478625f---81691269009.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c9c9361820a3e1f172ff75e2936e8aeb/94822988272.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607827f434a07---1628223965.pdf
    • http://fairmonteast1975.com/clients/0/01/014dde3c838f86fef2ac1d31a86c415b/File/32805107848.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606eac2640d00---73224841282.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc947bf2a9---dojikikewapikizebav.pdf
    • http://fujavietnam.com/images/Download/rilobivote.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5743c4caf1---tepajaveresurodifinabeje.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b5d3f1eb4---gosurufivibox.pdf
    • http://rolmech-strzelno.pl/Upload/file/juxofolovot.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b72f94c5234---memuvabevabadefufiwufa.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb0c723898---91170322090.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ae852d9a3---67359246441.pdf
    • https://medtek.vn/storage/file/22344313023.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=laceration+meaning+in+english
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e170.bin
9dde29223a0dcb0fc25fecb5d46db3433e0eb52b8313eca20d797c658fbe7d60
pdf-font-stream PDF embedded font (sfnt) at offset 0xE170 22544 bytes
font_01_sfnt_off00011bf1.bin
4d837f7c3d318a02332eca55435170761f78f8cf9e12494a782f9325bc78a184
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF1 17968 bytes
font_02_sfnt_off000137bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137BC 16792 bytes
font_03_sfnt_off00014fd3.bin
046b621932356ef2a1a4e8915f143aa898148cbfa1743b9e9187b2a58d84d65d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD3 10636 bytes