Malicious PDF — malware analysis report

Static analysis result for SHA-256 393f18a789fa07f5…

MALICIOUS

PDF

87.6 KB Created: 2021-06-26 01:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eaa88a9fb87c85bc6f9d5f5f08205998 SHA-1: 3baa749fe956ec0fe71bf85efa01239d0d8ca9e8 SHA-256: 393f18a789fa07f58c7b5cfb0bf325dd29f0f176cd603b5bd0123a7b237202a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a96d3e29af---vupupekanejodazekoz.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087aaec95d10---63644858781.pdf
    • http://kinel-hunter.ru/upfiles/file/tizuwifotutefe.pdf
    • http://deshdunya.com/blogimage/file/66981066959.pdf
    • http://alexhofford.com/temp/files/file/ralaxipojamerojiv.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e339563a5---vekajixixiserobakow.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/f32edd98dfc4e7e99a374d1f87d27abc/dedixonadotopinuxuwa.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776e74bbe6e---sevex.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/kepopajumazamixifalope.pdf
    • http://novichiha.ru/pic/file/lukovegovokojibovezat.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160740e92b7077---kuxugotovujotevopov.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ba100962aaf---juzamuzamamewagulaxe.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/vjga6dsmg4dg4kvhjdrb3ack5t/62947064349.pdf
    • https://floraplant.gr/FCKeditor/userimages/file/pupigojeninoguzodedir.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/1dc1b8bc7575f612fa5f27ed884bd26f/40102437147.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/79d418d8ef8f4afc56401d8327c2aa12/ritatatotiwejuxuduvevax.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d44d5c354e80ae14a480921c7a337d46/ruvisogelusaliletonufap.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/wotubegavotisogatudafig.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4de11f50f---43472161985.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e9d04fc1e---8163107283.pdf
    • http://busanpc1.com/upload/fckeditor/file/josikudonivabakopor.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/15edfae30f718d3bbc0c3747f9b9fad8/45747332188.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/f18e8caf13abf521550262b1caf2c2f2/patis.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9685328198---dirupasiwaxusufikus.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=valle+di+assisi+hotel+spa
    • 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_off0000f2f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 16792 bytes
font_01_sfnt_off00010b0b.bin
6d9db9cbf24fc068015d917c0a07cfe86730408a1f3c30dbfca718f9df3d807e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0B 10252 bytes
font_02_sfnt_off00012230.bin
82df3816cc1f78594c13b033c52edec254eedfa5d7575a83ce80dfea06945203		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12230 18380 bytes

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