Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d52d2bed5a689df…

MALICIOUS

PDF

95.8 KB Created: 2021-06-27 15:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 630195274544072c57c156a28ff01a63 SHA-1: 0f96c36a3d378de38c04ccf68005c0ea67e5e26a SHA-256: 6d52d2bed5a689df94cf1d95143a553ef20de5640a329dcc7e1ff933bda50fa3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://smidgel.ru/uplcv?utm_term=castlevania+symphony+of+the+night+ds+rom PDF link annotation
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4e74927d4---sedurotujuvofezavosizam.pdfIn PDF document text
    • http://renovator.cz/files/file/wenovux.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//tazutiporejirurete.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/4f7ccf7e13efd505bc696aad46758571/zoviv.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/vubifog.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a157350e2---liridivafuw.pdfIn PDF document text
    • https://saam.vn/images/content/file/11215997900.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/ligutiwolisugin.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/56497952801.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/b9d810bd3c3e9f8b6c156365831ecbe1/97150451257.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8636aa8e3---ponutovuz.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/6ba76448277d2b17c1febec7eaa15925/zemutarifuxafokevuzox.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfafeaf654---zufexewokozepesosixerel.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/vazatibowi.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7b1c92b8e---ratilumijaloxuwoxuzugej.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/nuwifegitone.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b36ad1a768801dfa101bbad6c011ec57/48850881946.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb52a3cd38a---kesipigasaxasem.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07b7cd0ebd---simas.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2d28aea5---14715348925.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/narowow.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAE 11156 bytes
SHA-256: 942c20dc075d779f382d81f89968903f087d49d43bf44ff1643d32f1ad718ba0
font_01_sfnt_off00011865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11865 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13077 25516 bytes
SHA-256: 4f03268b5935fb66c227a5612abea1be590e2c10b26a39204363794d82105fcc

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