Malicious PDF — malware analysis report

Static analysis result for SHA-256 29571049e26778d3…

MALICIOUS

PDF

95.2 KB Created: 2021-07-28 02:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7fb3d68ea3a0872cc6298fe007535892 SHA-1: 8d83e8c85c33dab747bf96009a32445fe7c8e5d3 SHA-256: 29571049e26778d37e13d8ad48b02aa1e0d890035c3ee03ed6baddce0ebee28a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a link farm or phishing lure. The PDF structure and embedded links are indicative of a phishing campaign attempting to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/embveap91hot7ksni4ecgo1slf/fabobolulagifiromevovu.pdf In PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9efdbdd52---43306481253.pdfIn PDF document text
    • http://insureatkk.com/ckfinder/userfiles/files/juwumixofubelosuviwagiwi.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8e3ea88d7---savebesugimu.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/bsmptmdfkvip063dotalf1ou0l/durubepelenasogujilije.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210724060017.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/vijusa.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/81172692102.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/mesebaradifigil.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/994447359.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/zexiwe.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/e161d5722ece3a123ad28d2dde30d1b0/10442430245.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe1f7864e3---koxudogipige.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4caa2a5fb7---34929966154.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/l3msgl80ahgtd3tlju04c6fcn4/dumotu.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/u7qqi65kjcc62qe5d17urvdf69/4233039891.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/51415839714.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/38350630540.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/kodudijamosixala.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080b536298cd---fenukibugovixepebuzoloso.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608354c2a328f---dotojonupujufomozofemuza.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/55243278327.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ef8f4bfa9---74251799274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=gordon+ramsay+simple+recipes+bookPDF 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_off0001113a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001294c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294C 17104 bytes
SHA-256: deb95bfee90ca8fe693f77d37f69f52a47aeb6b998ef66e62a31b4ac59ed7732
font_02_sfnt_off0001558d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1558D 10964 bytes
SHA-256: 2bfac9256464515ea0549dc11ca963c419e320256eef7609f5df0bb61b3a7cb7

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