Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7c7c0b63331b58…

MALICIOUS

PDF

96.0 KB Created: 2021-07-30 18:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 144e1a98b592f2fdb230ba3b8e533d45 SHA-1: 9fabd556b1ae9b581c864f31a6f7bf1d72882394 SHA-256: ab7c7c0b63331b586b2d47b64682b995a1c7109068b304806bdf01e53245651b
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and other domains, functioning as a link farm. These links likely lead to phishing pages or further malware downloads, indicating a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6258

Heuristics 5

  • 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
  • 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://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3e06f7a9---fokadivegaropub.pdf In PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/2424176597.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/be1b833706fdd7c8d7e9e93a55956466/masef.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765ac51e06f---11507937740.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e44485944e3---lediwifepa.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/potijemarib.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/98af5a9b836afdab9c11fcb636d62881/7960019789.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160863e2801c2c---64171000894.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/315fbd0f3cd4b36ea2578c895a81b0ff/tebebolukajejotuliri.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4ca62edcf---23597365930.pdfIn PDF document text
    • https://renault-service.com/userfiles/8527575047.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd0ee0ffb---73257520713.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/lanaxuzetafa.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/zuvajadedo.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074870e168b6---vaboromawazipejex.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/vauobu03p23qdjrd4ubsli4urh/79558736684.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/wurew.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4c02d433e5---36325162945.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903a00ca88f---7923370448.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/nejowopubolosubodibid.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/45977132205.pdfIn PDF document text
    • http://shosholoza.de/file/wawiburix.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/94471194601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=borderlands+2+bore+warriorPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001381b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001502d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1502D 23772 bytes
SHA-256: 1ae8d5282f9361ed4778af16c9d28a39dde6433dfa39829affe1efa266b64d16