Malicious PDF — malware analysis report

Static analysis result for SHA-256 a096c5f8fd0251cc…

MALICIOUS

PDF

88.4 KB Created: 2021-06-26 04:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ab84eb41d20a1efbd7e939655b7e84a SHA-1: 9b1aaee876dedcedbe49c81e7223d29b0a7c80ef SHA-256: a096c5f8fd0251cc2426db92bb262bced22985870dffbe4ec0f45a7dc51d6ed8
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL targets are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/9bf235529726b1b9b33ab632af04dbc6/tevevivepozunobutoparado.pdf
    • http://allycatering.com/userfiles/66023184849.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0a0ed8cd401a2ceed1dca3b284a8b97f/60373762163.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b419f3e1c---28532771411.pdf
    • http://alituncer.com/userfiles/file/xoratu.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a3c849373947438ac8089df1dee16bfc/97326717425.pdf
    • http://karat-dobremiasto.pl/userfiles/file/74953520823.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8f150d3ee---74798767369.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d249af1898---zagatagowozetakut.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160758efef2971---meviz.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd59394c24---185411592.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f36450e3be---54319280683.pdf
    • http://esoftland.com/userfiles/file/12476700369.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/aa1f4488daad81f864285f4bf5d79b61/76024331832.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6608f9e2a9---tokeluzisobedikijarebol.pdf
    • http://sanruou.com/app/webroot/uploads/files/11043844434.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/92864645656.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/5f23cce9b7f98f214e926c9272ad7b79/12027030931.pdf
    • https://slezanie.eu/userfiles/file/mutepowigoxuluximizames.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b786be9db49ea9dfd6cbcbe36df75edc/lujapadidenavosufoseded.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61b3c9ccdc---roliz.pdf
    • https://amitadevnani.com/userfiles/file/12531672811.pdf
    • https://codecs.ro/images/file/murorowufolajagatabaran.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/191tra6s300rbrhoqk6t0vcuu4/11774129991.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=psoas+muscle+pain+stretch
    • 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_off0000f92c.bin
bd8bf5b824cbd643a1208410fb027122cf1249902b54dd7e8f517b2239c7b77f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF92C 16464 bytes
font_01_sfnt_off000123c5.bin
e58219de48b714fc87889c49f77c66c4bf975df31785c06e2a2f2f1f20f46d5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x123C5 10740 bytes
font_02_sfnt_off00013c44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C44 16792 bytes