Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ed7c75518b378d…

MALICIOUS

PDF

83.8 KB Created: 2021-07-13 19:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4d90161b4c9e43135705106c06c7df36 SHA-1: 77da1c5cbe4dc92c066f800c9ac38d217401437d SHA-256: c5ed7c75518b378d32d42f9695f9280dd5ac253d27e6ac83adc444014aafb330
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to direct users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://drafthe.ru/uplcv?utm_term=consumer+credit+protection+act+wage+garnishment PDF link annotation
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/22232570769.pdfIn PDF document text
    • https://emmaushuis.org/pages/mesijimisewafaz.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/mukoziwagaxediwoneve.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/65611193470.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c3e0f0656---85482360409.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80b96e1078---fenizevilavapaperi.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/43557704255.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c60f600139a---47879764031.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/10752210689.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160818f169bab5---14723966980.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607adec8d5e76---35867261255.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4321ae792---70427415530.pdfIn PDF document text
    • https://jotelek.hu/files/file/20513943738.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/fevorexosixedot.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/91003313638.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/tifiniforabufigu.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/40960271751.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/zigumubirobi.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/japibukawasanajufo.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/2309022677.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0ec57a6ed---71734933692.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b759de5f54edcce2878258ff1bf6e083/53805552873.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_off0000e2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC3 16816 bytes
SHA-256: 5baf9977edef79656366f10b3d5bb42d476752dd9f704ff1de7129d5d1780d39
font_02_sfnt_off00012644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12644 11132 bytes
SHA-256: 6342a1dc7c0bc0e1cf75a09374951c7e94849bd9ee084dbd4574ba195082be34

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