Malicious PDF — malware analysis report

Static analysis result for SHA-256 200a637c3f6803a6…

MALICIOUS

PDF

75.3 KB Created: 2021-09-02 18:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 96d38b703ef17990ef2aa5d16afc389b SHA-1: 7e7ebfdf40305863d5b6e555bf826b1f7cf82430 SHA-256: 200a637c3f6803a6bd8e91e3ad7d1c7092c30023e24b0cca430479dd67c739b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=arthritis+and+folk+medicine+pdf PDF link annotation
    • http://eurogeographyjournal.eu/admin/fckfiles/file/95286535402.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/dd5bdd6c677c4805582c17b5041cbe9e/31008176860.pdfIn PDF document text
    • https://hoongnau.com/upload/files/40776272443.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/11531571965.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/cea82b3187892e2e01cb9aa07a3170aa/99257083642.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021082081343_848819056.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/medokuregebitodebegamu.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/rolesedukejefomela.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/bapinafewax.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/67258175238.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc4941983e6---nisosapovixijowogizimirak.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/26e9cc6503eb513017ff076462c33200/dusamadovomej.pdfIn PDF document text
    • http://artside.org/data/temp/file/betewebarimusom.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/71ff6a02bb5661ee138c09755730ab7b/serapapibidajepubem.pdfIn PDF document text
    • http://starlightcelebrates.org/clients/4/43/43e9139217482d7666ce300faf566241/File/jufekotomi.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/2d9330145c4a6f48a842533511605454/waxilepumisozujixodev.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/52570651765.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1611200f0f165d---sukisovaxogediwapemiki.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/184b8b310dbe9b99ba3968e6d0960cef/54709153566.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/vugovexurekakepem.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16076a96e0b04c---wofokudofazij.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/xudexudalima.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_off0000c288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC288 10956 bytes
SHA-256: 4dd08e8dfcef102c6d84d0ce37a3a8ef85a2bd10565a29d5b1d27837485d377b
font_01_sfnt_off0000dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 17068 bytes
SHA-256: deeeeee0d28434bbcb64c2b0de6e9da393ed5ff6ef18b89863a1fd38cdc4dc0e
font_02_sfnt_off000107b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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