Malicious PDF — malware analysis report

Static analysis result for SHA-256 f925392f8e38d02b…

MALICIOUS

PDF

84.5 KB Created: 2021-08-08 20:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 800148f4d32c568fca1bffd02bcd1727 SHA-1: e3182f918edb8ed110140bb5fd34383b5b902204 SHA-256: f925392f8e38d02b53c8a20f56ab571d180ec18c6b71a77e9a6f55996706af67
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous external links, many pointing to compromised WordPress sites and other disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely to lure users to phishing sites or download further malware. The presence of embedded JavaScript, though not fully analyzed here, suggests potential for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6130

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://uci.ir/userfiles/file/nelupipade.pdf In PDF document text
    • http://mmckno2010.zkosuchdol.info/files/fiwudot.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/joveponasaxufazulipuwata.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/9f72c823d961e178c99c868a431b5eca/19421511114.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab14079ea3d---85861053742.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/494e3a922ce5f4386b5e4c6e4ecee808/47556685784.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/mikeliw.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/falalujolivajew.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/sorodebirujegidaken.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/807d8cef92072c918682576be9fa70f2/41987947866.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/1328642756.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/68539529806.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/e2b9df037cdba0fec00f47beb8899608/7954981450.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3otht4516ct7rji8dg3nsdbkj/58749233097.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/8229769014.pdfIn PDF document text
    • http://iccarrentals.com/files/file/dadanixosexujutajopenu.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/39390589886.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/28a8a1e22d9c965b6bc0f0e01a433410/pajalizutupazi.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c75a811ae---pitolexalakoj.pdfIn PDF document text
    • http://cpils.com/userfiles/file/34905085983.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094aedd0c5a7---jolipogafar.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/o616pg45hq5mvevt3t4fi7gjh9/zipimu.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/7m9aqcnm5ras0geo335rtt55he/3555265618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cours+automatisme+industriel+pdfPDF 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_off0001069a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069A 19460 bytes
SHA-256: f813e151afd53e77141b284888bd3b1ab7e7f754714e874f74d22b803e8b6b14
font_01_sfnt_off00013644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13644 10788 bytes
SHA-256: de47cb8400d8070923e209138c347b94c775f416557b07a5e5fc5a023d166030