Malicious PDF — malware analysis report

Static analysis result for SHA-256 300b30f544d8ad97…

MALICIOUS

PDF

88.2 KB Created: 2021-06-27 16:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 78331adcaa639e38fae5b6b4dead9f1c SHA-1: fe5badde2b8d36831f3afe9224e2f0bc783bedf1 SHA-256: 300b30f544d8ad97ace1e23e62368f47c3bc8355d93b2e408777fbaf895b5ff4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to potentially compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the extensive use of external links is the primary attack vector.

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://archism.ru/uplcv?utm_term=tax+deduction+for+donation PDF link annotation
    • https://beautyyaurient.com/editor_upload/file/51730263548.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/89e6c349d4ce02ea5a67ca45063cba4c/nutasexineb.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/fd0f5c6d1007e8da60e34220e71677ef/93325898099.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/b8715793b0b4bcf110917342dccd2782/wowamejaziwanaxanale.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873942d81ba---33921608993.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad140dcee04.pdfIn PDF document text
    • https://istanajp2.com/contents//files/83720360659.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/popiramowiwibizo.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/lowun.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/gegogifoweko.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086badfd28fc---jotowetupudukadavuvej.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/40753118438.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/90241711888.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/e38863f398e4ca7ef36b295a9c68784c/wofuzejegoja.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/saruwada.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb26533ec5---35713496092.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/jaxuxutuwawexiwab.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/71970864100.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/6460279899.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160705f32c6ffe---kenujebilonivijasapu.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/8038ea26c6a2d8a3cc6ff260b77a2417/45655571158.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c82053815---patelawirez.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9a6cbbe8a64bb89df6fbe17afeae8d10/32239054439.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_off0000f65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65E 17412 bytes
SHA-256: 7db7537f9b0852a7cdaa0f2d34951a31773ca17141ad8f1fad1e48453bd6ed6a
font_01_sfnt_off000123ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CE 10420 bytes
SHA-256: fffce324bc02ecfb75d8384e19ae0a4d9e248bd3e707b35f0a8620dcfd197954
font_02_sfnt_off00013b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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