Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e7d080b9094783…

MALICIOUS

PDF

88.7 KB Created: 2021-07-03 17:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 049cc7db80f28570c1ffdd13d7aaf1a8 SHA-1: 0155a1a7c8f8e03bb25ff2e2ca615e66cbbf22ee SHA-256: 85e7d080b909478303265f94779aacfbbaef27f4e9ecbda404c52e80fe3da975
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://huntic.ru/uplcv?utm_term=happy+birthday+nursery+song+download PDF link annotation
    • http://dichvu12h.net/userfiles/file/41880126709.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c6d8eb2c90242003de0fec67d04f588c/95442033015.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/1i6t0jhd049chdehfc21nlrp2r/27700541352.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/uhf4om78rlndlie0c77tf72k6h/nasamevorawal.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/ba4008906404b515dba677851e94cf44/86304524670.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/7fdb17d5c4108de002483db2f24b8936/5932232481.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/d0837f2c58b2cb77be817076812b5ecf/31612286411.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a861802b88f---refomidubejinep.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/peret.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/215e740c7910987cc9fd495ca7993f47/fezajibozabijexebemuve.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83254101847.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210515215243.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d043da88---45366113164.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/50826430792.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/t4kpmrt1ndgp9j0m9qmuk4u8k8/48996753923.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608de5f67b152---ziberunu.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/mowedevipep.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/kitogew.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/wozesoguzev.pdfIn PDF document text
    • http://splogservice.ru/content/file/93137499574.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609df6cb2d56f---29262416711.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/1203503906.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/6ba76448277d2b17c1febec7eaa15925/zemutarifuxafokevuzox.pdfIn PDF document text
    • http://flgr.ru/files/files/gabivigumob.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 11104 bytes
SHA-256: a8687bd95c2b7910d16306e2082540924b969a5397725025c7beda7754d6381d
font_01_sfnt_off00010f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8E 17060 bytes
SHA-256: 8e89b89422bb062cc4e89d5674273b6f87bc48b7716ce91a51868a7bdfca079f
font_02_sfnt_off00013bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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