Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ba26b6fb724980…

MALICIOUS

PDF

85.5 KB Created: 2021-07-18 03:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11870aae4118001779aec778cd39435f SHA-1: 0f49af31efb10e9dd8b0d0a29e9d318ada89ad30 SHA-256: d9ba26b6fb7249801e30d695b9f8418d899a93168fb9e3e448b3d1e5234351fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress sites, and ClamAV detected it as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the structure and embedded URLs suggest the document is designed to lure users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3f8ee94ef---62619958695.pdf
    • http://deepakbatteries.com/uploads/file/vikazota.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/afjak5ievb28gtuve3ha8h48qk/47466200260.pdf
    • http://omonetach.pl/foto/ilustracje/file/89836844018.pdf
    • https://hrmconsulting.biz/upload/files/bejatanom.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/8cd8926289586e12c19ad08ab4d1da05/4418436730.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd902b02bde---vujejerimadosidone.pdf
    • http://irollee.com/userfiles/file/nudowizevumukigopazowe.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/e6a078a2f78d18decd5ab65c1c288962/30633340844.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804150cf283---riwewatoruvop.pdf
    • http://24horasnoar.com.br/ckfinder/userfiles/files/jepuvetujukedogi.pdf
    • http://eia-edu.com/userfiles/file/88522430947.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b323c986e94---zisuma.pdf
    • http://denki-shonan.com/uploadsfile/48025799892.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/f0a63625a17cc556995d3310ba19a813/pupobukisazurefinezibik.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bdqlr3fgbaj6h3a6l4uff7du03/48992515548.pdf
    • http://scuderieverdina.it/scuderia/userfiles/file/fizasiw.pdf
    • https://skvacations.com/userfiles/file/73382950675.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/42pi7e00h7sp2ogvljsusahdnf/14123293234.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f7f3507f93e63f9604fb247370d21d6b/73755488226.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97b9aa66f5---73417008132.pdf
    • https://aprenda-atdi.com/uploads/files/pifarinizumobig.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982dc810f91---wexirage.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bulave+tujhe+song+download+mp3
    • 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_off0000e984.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 16792 bytes
font_01_sfnt_off00010196.bin
cae41b5d5fe3b3cf98f176e8f2669017b58286e0dec4ff82cf9cff26d7f0530f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10196 17224 bytes
font_02_sfnt_off00012e9d.bin
46608b79201be25b9d2500adc4782485ada96941b4c752aaee63be712c8479ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9D 11256 bytes