Malicious PDF — malware analysis report

Static analysis result for SHA-256 148a514e206bbf52…

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 14:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bebb0b664d6f4e4717f99ead1a20db94 SHA-1: 7e11b1c489f194519f28e9dcb7d29def294300f8 SHA-256: 148a514e206bbf52f980daefc9dab3705cc21f6fd72e330c83e85c1b88d3e833
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for 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 https://garglob.ru/uplcv?utm_term=excessive+daytime+drowsiness
    • http://globalquestconsulting.com/userfiles/files/89155118137.pdf
    • http://waelfawzy.com/userfiles/file/zovaxegugamepenibaniveb.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/d5a35a86223ec67aa085a864164778e3/63880003389.pdf
    • http://prime-standard.com/piceditor/file/96567719955.pdf
    • https://xehowo24h.com/images/ckeditor/files/nakanunuf.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/8079f1f616fb48e99177a5a50b831b80/dubunagofibepef.pdf
    • http://curry-box-deluxe.de/userfiles/file/38585813716.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7efe6641e---28163101386.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7f4a8afb6---15551054287.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160722d716e4c2---33325023354.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/98bcce6b42f02c9988ee92abd44b9a62/37720906612.pdf
    • https://aravlicraft.com/cmsCart//upload/file/78270895257.pdf
    • http://digifast.cz/userfiles/nomidusovojepeverexumiv.pdf
    • http://maynenkhiinverter.com/media/ftp/file/jubumubikofu.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/6bf9274d4aff1875910679b2f726d2ea/lumepuno.pdf
    • http://ytbozhuo.com/upload/file/310507113172.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/55804d57b52b1db2f48c8af320d65baa/kokafada.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8004e4fc61---93697021776.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ip4bnaa3r1oa71m0v92epu9912/38528965316.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/7acb3bb5f2b91ee7d9a8a9256bcf2e24/8425585227.pdf
    • http://cnc-soustruzeni.cz/files/file/bapidof.pdf
    • http://ats-dz.com/userfiles/file/bulezavatixavozuxadovugep.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/65cee08ebbe8a5360ffc4b5a816e9539/1173257533.pdf
    • http://acpiindia.com/userfiles/file/sipememax.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_off0000f49e.bin
fa13f90c92e9fcdda43d3b947ee1864fe2bd9d75dca9f0986100920cd7cf91ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 10836 bytes
font_01_sfnt_off00010db9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB9 16792 bytes
font_02_sfnt_off000125cb.bin
0acbf9ac06f07446b97f5b0b3a834209dd2a1b1a27092d6eb8fb142ea7f29bc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125CB 16296 bytes