Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9483cd428c2c36…

MALICIOUS

PDF

94.5 KB Created: 2021-07-02 20:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 99fe034e272ec81c5b9551f0a07afdf1 SHA-1: 68ebb0cc1a4403f58a935f8011c22fc326d1193b SHA-256: 2c9483cd428c2c36345244707904f12b6de21b3a406e5a210005eda9105b6ab7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=getting+to+martha%27s+vineyard+from+nyc PDF link annotation
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2845ae3cc537127e8fc956d5d913815a/lawapepuliwateret.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac8337a214---73892395520.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/7616043023.pdfIn PDF document text
    • https://drlanda.hu/user/file/zavap.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/21c9c0f3ec6f8e9bcd92c7f332268481/64672747327.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/c49ddd319741fc773e00da8c831a3fd9/79061614406.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/43309812760.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/vct5tt93hih9bcukoq57a18qo6/33866945926.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/62296857335.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/fa11436c6f160fdb518587a8b55f42eb/83819887102.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/903b1355cfb7c0337c94330ec8505854/jufovenurolesam.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f1a47e062---rovipobomuxijevowute.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081138d5595a---13641899570.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/igrroj3viqr62a5rg97b0g5l19/28890415242.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/3588593531.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a024f2a88---62561795119.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/11495693335.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1c5b06c89---46755206166.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079c0ea40886---lexisavapavonemepodujatag.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/wiximinujaparezesajuvef.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/61637450251.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160858ad200bc1---fipepasuwixujowibiti.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/b48e17eddc8e21bead9b98fc39e9f340/66159069251.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_off00010cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E9 17052 bytes
SHA-256: 158ff34c09af8743b17c007e1d472eb777e613749d57f272a76cfb7c27a700bb
font_02_sfnt_off00015175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15175 11132 bytes
SHA-256: d2df6798c73e373764c8ef4ac19d0a7012174f3750640f3cbe9c2ec94aca9ec4

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