Malicious PDF — malware analysis report

Static analysis result for SHA-256 7586423821919ba1…

MALICIOUS

PDF

81.7 KB Created: 2021-06-29 04:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 696b987b5cfbbd6ec749051c80d24cab SHA-1: badae5eba2d1aa2c11f370874298f4872e96dc1b SHA-256: 7586423821919ba1af45d3aa2a3efa5e398fcce6c8e6d006ca5b41c11f838471
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/231ca9d16a8e92d0c40bdc5f550204da/fulesuk.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072eb895574c---11454275537.pdf
    • http://broorybulldogs.com/clients/33993/File/40832064814.pdf
    • https://madopin.com/calisma2/files/uploads/kixibani.pdf
    • http://files.ibiza-ferien.de/file/4064015013.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ahpv1r6etgeilurote7mfovev3/jadawexipaxiwanogu.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/417lpfgv1lreia4n20961c2tee/ruwuv.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e12bbc84---tokivikakoxutafik.pdf
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/4851920846.pdf
    • https://egca.fr/userfiles/file/zenagu.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/cc4692108c2b51f06ccbaf6d673a8f9e/korufom.pdf
    • http://tasteofruraleurope.eu/upload/File/xaduludavuxeporujosabimew.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626e38d20f---tulanetajijijer.pdf
    • https://glaze-metalart.com/upload/files/55429724672.pdf
    • https://clubslotalmatriche.com/calcas/file/90913070538.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3239d80ba---jimulubekigeko.pdf
    • http://www.findvoters.com/userfiles/file/nixibukofebaraganawa.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/7kv7k6uc5t0kqfksqlfpfbcbon/nonaxefuvodeduv.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755e82ae0da---10698065036.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/b067c1d0b2e53d56877571e76ca3d202/vebadi.pdf
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/95374171510.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160763895ab996---supipemababaduma.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083607e61105---44598838554.pdf
    • http://marinapogon.pl/upload/file/32775042083.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=exponents+and+powers+class+8+icse+worksheets
    • 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_off0000c396.bin
5f2a87ed485690ae99dd00ffd3dad57dcaf6de75c4981ecbeeee12bb760f3f7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC396 16144 bytes
font_01_sfnt_off0000d8f4.bin
2a2426728cc07e6d53ea7abf0d98dc21153e4c930180494279f171734602b57c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F4 11084 bytes
font_02_sfnt_off0000f2ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 16792 bytes
font_03_sfnt_off00010adc.bin
0223d57968d4788b56142df931714f2e6093c61bde166890fc6fd27841f12aef
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADC 16888 bytes