Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e55ee8340a9a9f…

MALICIOUS

PDF

70.3 KB Created: 2021-09-19 13:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5976bb3f2f874ff9715a896a5b584db7 SHA-1: 1be862319ff6cc3c466d03ca30c6af6075ca12fe SHA-256: 68e55ee8340a9a9f6e246e793b6d9d2bacae386cae3598ab5a6d369f3ed57926
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic to obscure the true destination or host malicious content. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7779

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 https://chcial.ru/uplcv?utm_term=how+to+make+an+android+phone+vibrate+continuously PDF link annotation
    • https://jkmart.net/FCKFiles/File/sabiropivali.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/20995539252.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613365dec48e7---64398674248.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/33168368720.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/fujowutugol.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/wolenosejaparokel.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/jawozurewebedoba.pdfIn PDF document text
    • http://ahnil.com/userData/board/file/11168286291.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210918233403_n2lgea.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161412b89c3bd5---zasimepupuza.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/bumasawunijuxiv.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/jobaxipudodoputebomosajo.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/17810077727.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/22378475423.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/remaroparokugod.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/tujonazigimufanegit.pdfIn PDF document text
    • http://registermycompany.in/admin/userfiles/file/sitowixisufap.pdfIn PDF document text
    • http://hocomesun.com/upload/panem.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/80609799746.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wenerixokovomadajumu.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8a7d99a28---xajozopagedum.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/netedifenekuli.pdfIn PDF document text
    • 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_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 18552 bytes
SHA-256: 5e38e30d7e09159a46ec1d2a68e7ab2bff418fbaa2282ae81399a0a75c3f1c3c

Open this report in the interactive analyzer, or submit your own file for analysis.