Malicious PDF — malware analysis report

Static analysis result for SHA-256 65af7e27ec79f592…

MALICIOUS

PDF

79.8 KB Created: 2021-09-07 14:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f94133afc03b2ba9fc4a9c1f8b10b65 SHA-1: 0e183fc25e8aded0b251fe09c4d2525db4ab379c SHA-256: 65af7e27ec79f592b126a1cf7aee0dff92875470c353d1c693c9df1e7988b251
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely part of this lure, aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://ray-king67reunion.com/clients/41562/File/73562310803.pdf In PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/4dp868esdfltloh2on7488ovl7/nofamezijuzeketejebaf.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1adf3035dd---wiwujujisaduwotakufeb.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610d493fc9547---kaxaveboziweruwol.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f584c1da839---tebolodub.pdfIn PDF document text
    • http://thefertilizerproductionline.com/d/files/22261331009.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fc6135349---gorosetikofedifari.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f3e56ba62---75692467019.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58b3d373ce---11257656815.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/12863191107.pdfIn PDF document text
    • http://ruresept.ru/files/file/42920881681.pdfIn PDF document text
    • https://anup.bo/images/files/53098321368.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/8332863882.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160c84dc81bba9---ramovararuriwet.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f96e86c32666bdda0dd6c98b48f9acf7/bulenebedodetu.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/jurigepidofe.pdfIn PDF document text
    • http://fhhsclassof70.com/clients/4/42/42ce21dc30e429aa976ba070b22ccf93/File/68168805488.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/46639095460.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b0af4c69c---wupipukow.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/jidase.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5877b2c58---44940380333.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/tasurawoxabesapav.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/2c362815ea2b04a564297bf118e0e622/96882627856.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/25189398b06f6a615f3059abb11e5c48/13293161440.pdfIn PDF document text
    • https://edgecs.com/documents/61965573596.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/63598168227.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=disegno+meccanico+pdfPDF link annotation
    • 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_off0000d46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46D 10720 bytes
SHA-256: 729cb56659e229ad56ba888b8efff88fbfa857ff07786e3acab86b1edf9cc20a
font_01_sfnt_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DD 17236 bytes
SHA-256: e4dcc87c8dd37ee14714ad987e57ad81a88871ffcbfe152a06bb583fa306d891

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