Malicious PDF — malware analysis report

Static analysis result for SHA-256 c860b364d90f2a8a…

MALICIOUS

PDF

66.8 KB Created: 2021-06-28 00:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 61164f083592e56c722bfa6544249e48 SHA-1: e4472c739fbb7a99820e5ae97963a3aa24d6f7b1 SHA-256: c860b364d90f2a8a523cc93c36164b6759d107c8715d299f60b1ab54e3ab369e
154 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised websites, indicating a likely attempt to redirect users to malicious content. The document body is heavily obfuscated and unreadable, suggesting it is not intended for user interaction but rather to exploit vulnerabilities or host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9312

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://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/43537289690.pdf In PDF document text
    • http://gumberryoleschool.com/clients/33891/File/zevusi.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/9e77ab7a581a037be9b68e1e0c95b609/72939307788.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a89d0289a46fe4f6ef63afbcfeea58d1/duretuw.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aff3b525cab---71743150985.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfd6a6b9a6---24297421560.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/78859955893.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96d02829f---8973010113.pdfIn PDF document text
    • http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/wigesapuvukedix.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/puxex.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c5eae8dca9dd2f8795103605e40bcd01/89284472066.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/516hbpqvgkuh6fcj0u55g5q5j3/waxefidajimugufeb.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/5ef1ef649fe199c428ed14331484a482/78088105468.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8bb94e18b---panubasujuxoxabekumono.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa0065d489---kinemaxuku.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921946b0176---42501568805.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/96000002860.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/vuwijomomidufinerifula.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d44be1d233---motojatamamuguk.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/92412109448.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=tony+stark%27s+house+minecraft+map+downloadPDF 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_off0000ceb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB1 11272 bytes
SHA-256: 5bf470b7dfbae1291d50bf8927829ee8849fd3f9334ee3c00e38206e22c84c35
font_01_sfnt_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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