Malicious PDF — malware analysis report

Static analysis result for SHA-256 9419ae0f341e877c…

MALICIOUS

PDF

78.3 KB Created: 2021-09-17 20:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2b0bcc9f7b0ffe61070e929ea0848d69 SHA-1: 589adb8220ab48c67b07b2d99d9bcfb033c6b8e0 SHA-256: 9419ae0f341e877c437e06053f6154e17da6d3ee23dc88fc7971e5bbc5eca160
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of these URLs and the overall structure indicate an attempt to exploit users by directing them to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://catamma.ru/uplcv?utm_term=moto+e+2020+root PDF link annotation
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d43ad34057---pukakonuwozolol.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/sozokizafoja.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/95821627457.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/88271954683.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109110548284301.pdfIn PDF document text
    • http://datcat.vn/2018/file/80565066847.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/9bc12ff747ff5ad8a546b965d2e02498/ruxomodejes.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/95916845257.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/88705971199.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161432dbd619ec---gizefisujosobisetoro.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/kuzamunevorivuzew.pdfIn PDF document text
    • http://espwireless.net/uploads/file/xisanupunowalofixe.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/2211a59f1667f50a61816f36783c050e/jukazisapisuwejomamesimog.pdfIn PDF document text
    • http://htygroup.com/upload/files/62489736715.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/13290413728.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/37595030093.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16139969f03b51---sifojoniretuf.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff5622275e---gipedunezi.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210913_C7DC89F577BB7DC4.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/amd10469qoakcgmk85mb0stgcr/ginujazolipesak.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/37989715811.pdfIn PDF document text
    • https://ip-pharma.net/data/files/91571591.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_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 17952 bytes
SHA-256: dd978519969c6e5abc46865ceaa6cb2a813a7d3494ad9ed57c15165c95015b70
font_01_sfnt_off0000fe74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE74 9764 bytes
SHA-256: 6245c214e33104469284475673597fa296b13cb98276750bc891a887da85e510
font_02_sfnt_off00011403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11403 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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