Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d382f5e07a94f50…

MALICIOUS

PDF

86.0 KB Created: 2021-09-18 20:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9d2ae26180b01de41d790f5a74f2b107 SHA-1: 67988856c24f4fd9da2a4373619755c222b6c8df SHA-256: 2d382f5e07a94f50e74de1719cfbc9d6a641da84d50992c74cb7f8730581ec54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful sites.

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 http://intertribo.sk/files/jakifuvemezaridijuvidagup.pdf In PDF document text
    • http://kitpaisal.com/mypicture/file/23829509905.pdfIn PDF document text
    • http://balaton.varosom.hu/userfiles/files/tinalijinulujegazajaz.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/73889926254.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430c6f4e963---sinediruletix.pdfIn PDF document text
    • https://kawanmto.info/contents/files/8781673480.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/78693045574.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/wobeva.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/95145368436.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/061ba32c0c38a7bd6b3cbd06241ac0a5/tapowonofaraga.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/dedaz.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/89275557472.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/67527055660.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/wedimovojoxosasoxej.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143eadc08585---62062278505.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/jupagotuw.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/me0ospggr6c0nj268vq104v9t0/84308462563.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/midefijujanegemijosi.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/jubisibubotunabexodoxav.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/48593992735.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/95255164807.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/kotipezabefazep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=pokemon+md+explorers+of+skyPDF 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_off0000e345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 21072 bytes
SHA-256: 96653aa4e10d09bebfc9f0e1cd5c57b1a23b85624c5d8b4700d3bddb5b658471
font_01_sfnt_off00011a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6C 10616 bytes
SHA-256: 8ad07a6ab562955b848827079466377e0a856af56ae1a5dd72788f05e1745fde
font_02_sfnt_off000132b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1