Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8f0ec80cac32949…

MALICIOUS

PDF

93.6 KB Created: 2021-07-12 17:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ec633dd0c041ae27a6cd16f54642d227 SHA-1: f871f3fc41d4e00f6cb5a1eb4a74eea9b4d1acdc SHA-256: c8f0ec80cac32949f0058b8c99b4147b347c5e95a66201218cdd65d84dc39d7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the structure suggests it acts as a lure to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://garglob.ru/uplcv?utm_term=meaning+of+overrated+in+marathi PDF link annotation
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/650e33ee03af5193c8236743aafa077b/75223947279.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ed27ea7b17a8a3f62523529bd4694fcf/basanakosabodamero.pdfIn PDF document text
    • http://crm333.com/documentos/file/zefexuzatabarotuxisugesu.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/e7387b90f862f99b66c5404c088041b3/sokoxezokiketevabivate.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/44d35d64fcc80d86b6629c83d38ee0fb/98605651268.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/zises.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/ib6fchtnhdfg4m1v3pvtktp885/53897599824.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160958a8e1d232---78183745250.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/26bae3fde58adaef5095457b3c335e7a/dabuso.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae49c1195b7---dazusekigaxigewa.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/2f55bbf79d485b0612175f6139329502/zilisorewab.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/kojapazenitesemopo.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210529_103653.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021070707465470554.pdfIn PDF document text
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/gojed.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/tohosld1c0o5fss8ilguhv1v96/96635942749.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceaf62feb2---wejun.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae42e1d217b---31481619243.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/9d0dc061e7e48d2f6e8aad02d1c553f1/81739640517.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/542ff866b9930fab382817b23f7a037a/rezux.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/46840655924.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/vuzelej.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 20100 bytes
SHA-256: 91958b6ed799b4e950f2ff37c4001087c320008c3840d330dea97b892b40a271
font_02_sfnt_off00013b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B87 10648 bytes
SHA-256: b1717804dcc2d32ec3665384f5f4876fc78a9588f91897b6f1a50d39c3501c8c
font_03_sfnt_off0001537d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1537D 16448 bytes
SHA-256: 25b9c34b44ea6f8dffb183aedeeba05c5cf292536b51eb25ccbdb9c4140b58a6

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