Malicious PDF — malware analysis report

Static analysis result for SHA-256 48459f75870cbf16…

MALICIOUS

PDF

76.1 KB Created: 2021-05-26 11:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ab00a6f9d3acb71802e36e57d8cc815 SHA-1: 9792a6ff1efe57faddd1b10e96707f0c0740e207 SHA-256: 48459f75870cbf162158a34bc33d2f60fda9763d8b09de6f8179396cdf021599
156 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'detox diet pdf' and 'wkhtmltopdf', suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/uplcv?utm_term=the+9-day+liver+detox+diet+pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/cc4d08384e8080b73981407605f92842/62556659858.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772e6898032---fokoxote.pdf
    • http://handbook.hu/upload/page/file/8369293154.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/0bttc931tgjn829ronjlstcedj/19432131622.pdf
    • http://aircond.md/upload_fck/file/famirikajenunotedusew.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/844b9a13c192f1827731c0a075b0dcfa/15702012285.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/62b922aabc252be4bb21aa73afbf2aac/67428203819.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/b0bd5994f5b694a5bc25c307cad43582/dabugazimewuzisewel.pdf
    • https://aduanaldelvalle.com/userfiles/file/22650645226.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160742b645cf59---833557309.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add77d1bb47---kuludejuro.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/de08674d9d76dcfec87a6f618b0b88a0/34033820844.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929e3c4f45e---romabiki.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baf9b45b56---jofupo.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/25210648230247f3e2d3af9e8f01dbd4/lurirokuj.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/50993ddb7f0f93568ab56d9007f69023/15908988673.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16095bd9e3fca8---kusevawir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb4c.bin
9a46eb17f1813b829141bcafc59701e94893591f5cd17de3b20b8cade952dacd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4C 5320 bytes
font_01_sfnt_off0000fd77.bin
c0c9859903a5ed60f28f9124baef009434eead39ee20f4f4142caa88a2da79d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 10656 bytes

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