Malicious PDF — malware analysis report

Static analysis result for SHA-256 15220accd8ffe6bc…

MALICIOUS

PDF

76.6 KB Created: 2021-06-13 23:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e62f9724c3f815a773884f960fdb2a0 SHA-1: 74b0df75f20caa809fc2a9d42a288a6e7e68abc6 SHA-256: 15220accd8ffe6bc9ad697782a05326d7e17dd4b84d60a1586b983176489077d
184 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites and raw IP addresses. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further payloads. The presence of embedded JavaScript suggests an attempt to exploit browser vulnerabilities or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=gold+market+open+today
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6840630db---18367893656.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d37a72c986---xolaletagusexemakako.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/f981082cdda9cdb4bf123822e09c65df/womapemufemodapokima.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607606e9660c5---42044136250.pdf
    • http://crmrealty360degree.in/userfiles/file/tanepolanubufijufo.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85e1b0c184---73836508137.pdf
    • http://allycatering.com/userfiles/nipirirepuki.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/888bd5eb1e204cac9ceb701817377a11/37871529019.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/jm2pmtmu256ldt4s8k0o66ut9i/wakiwizodusipiwukiwivet.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160796b1db92a2---18654740884.pdf
    • http://didaconcept.com/admin/fckeditor/file/sidedabatoregugekuside.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe02a352f8---pelinijewogurupovivu.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2c5b1f20cb8d66b63ea7e3304fe834d9/wasukek.pdf
    • http://gold-carsales.com/js/upload/files/xovikat.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/5fbc9155038f304346ed02ad3222befa/vepinowivot.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/nd2k40v289ke52pcqo5qkcps95/50405919871.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_off0000ed2e.bin
aebd235f3488c21ab545a7b173347bafa6362d792151505af95828a09c744d6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 5124 bytes
font_01_sfnt_off0000fe8f.bin
7e9f9ee3ac527e970a9e90b440ec12e9a4e46b9933421a2a63bbe88038212a94
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8F 11424 bytes