Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5ad9d1ac151d0a…

MALICIOUS

PDF

81.3 KB Created: 2021-06-10 23:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: dc00d174ccdb32e3253533cdb7355983 SHA-1: 095c58e8dde22556331feae97ef1e9fd09937bf1 SHA-256: 8f5ad9d1ac151d0a17bd1d106714a0e781ff3c7085472be6adfe7ef9790dab0b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a lure related to 'The last airbender 1080p' to entice users to click on embedded links. The links predominantly point to compromised WordPress sites, specifically targeting upload directories within plugins like 'formcraft' and 'super-forms', suggesting a pattern of hosting malicious content on vulnerable web infrastructure. The ML classifier strongly indicates malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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+last+airbender+1080p PDF link annotation
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/oki0hh9ric8ijfvflvmrgmfklh/34308012206.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/f50b8e62a411370d2f4434503957dfad/nijugipareporadan.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5f2e638b6559562a3359cdde3303bb84/70381303830.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160aa958a5c638---rovover.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/51941106960.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/necd800sdep3bko5rice6s33uf/buvilugu.pdfIn PDF document text
    • http://nensi.si/upload/file/61904511912.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a43e9ac1d3a---95688112518.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/p2cl0ch9p5k78b395rtqqsv0u4/janota.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/jizutepajiweteribobaru.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/dazudotejesafag.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b48eb82ceb4---74192459359.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/n1k9tdsrcuojtaee8001vlpvn7/tiroropivupipus.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c7d20290e---vaxopusakadozofanaxiri.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/6n2fbpmvt06hjack7desjpqh0e/kamafawalitaxages.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 5524 bytes
SHA-256: ec97a647b1308562add3655bebaec7c5880925f1c4864493761ccd2782a806a0
font_01_sfnt_off00011186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11186 11568 bytes
SHA-256: 68330f973792e308274652519fa3469c8fa07fd13326339e607931c6a1ad8873

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