Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60219b7cb8f0109…

MALICIOUS

PDF

77.8 KB Created: 2021-09-07 15:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 801008786cb376bdc5a7a79c43cd78d7 SHA-1: b781d14eba7df073f32790126e619654789e8398 SHA-256: c60219b7cb8f0109d399461e93b1651fa33fe579bd038d70fda398eaf07a3157
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://tandprotheses.com/ckfinder/userfiles/files/77295060489.pdf In PDF document text
    • http://mybed.tw/uploads/files/202108202002285485.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/puvopujudegigoke.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/04gafgrtvostdcc2b4fva0u4li/69941197221.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/vrk2stq4d9vl6uvso7ikk6vvlv/xutoludanala.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/026747c71d44bcad57da1b71b7626bdd/96168652140.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608858669c4cd---3040238434.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/timawudazamesukolusu.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/kinetofugawonezoxa.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/72683cde94c3817554ed1b531a04c6f0/8196216353.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/47828927b2ef8f9d18d7bec70a1b7f95/fadozuzewod.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/79262858730.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/ziwazineguxudunixeputuko.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2e9717846---51948295268.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/naf76vhi2dbh3ggen3i478eit5/nevojozuwabasisivemalo.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/9989753d99f20ed7e11bb9760fbc23bb/25373333281.pdfIn PDF document text
    • http://ashioke.com/images/library/File/67530522925.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16097cf4953ec1---winowoxilesubabonu.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/xupinisav.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/kogijadilipepadenam.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/pasibutemixubaza.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/lewatajiwunobe.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/25910862713.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f8990a8aa08---99454730402.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/51182586785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=sankata+nasana+ganapati+stotram+telugu+pdfPDF 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_off0000c137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC137 20736 bytes
SHA-256: a6ac62920b1c91473046309a1fb56d14e29701d87ff5e6bc4e10768a451ab033
font_01_sfnt_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 11108 bytes
SHA-256: 6d5bbb4afb8c693250dd7fd4d9bab33232bf68147e7596b3d802ff3388799903
font_02_sfnt_off0001115e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1