Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60a9bb7269d45de…

MALICIOUS

PDF

68.9 KB Created: 2021-09-14 07:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 143f4cb145be9b8b1c6a1b7d401d9761 SHA-1: 0d4bb60ad8613647d7c8894980733857e0f3feee SHA-256: a60a9bb7269d45de654764b09e2bb29e4507267f059943a3ed703e38ea265262
94 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and other PDF files, indicating a likely attempt to manipulate search engine results or distribute malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the nature of the links suggests potential for further exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7138

Heuristics 4

  • 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://ccshecea.org/upload/files/surez.pdf In PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/jiresawobisojuwu.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/39369759014.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/tst7lnonpr3sigck2pf5fk946q/56948349346.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1613f011022c88---bulolosopejuxadawomoxato.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/3353872166.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/bakerobadanakugisir.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353eab95321---pedudajapajokabukigarixef.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/45175362584.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/3ee348e6d68556ebd91d1221834fc326/vozawonalulog.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/sifofofetedaxuriz.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/rotugobasot.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/33225012276.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/konosokepalutunebuzejuxur.pdfIn PDF document text
    • https://seerupit.dk/assens/file/90069156017.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/ritemejujizilasose.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9edabd461b103a2265b4e85d460b65e7/41464185138.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/14205705960.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/xuwofonegawifowipedofare.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/22931779385.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/45905996445.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/tebuj.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/vuwilaxagimefuka.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/jujigu.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/93017237954.pdfIn PDF document text
    • https://oasis-travel.ro/files/dixewiwurotagaminudabiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+restore+everything+on+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7B 10736 bytes
SHA-256: d24fac8592d4058f3c2c6174a956c96fbed56bc0e8ce2ad5f2c86d9e3ffa882a

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