Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e56c6ef2899222d…

MALICIOUS

PDF

63.7 KB Created: 2021-09-02 08:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9ddfbbc17e200878a1a594f45c58703b SHA-1: 11aa6f10dacd53d58a1276c485085e851a74aaf6 SHA-256: 4e56c6ef2899222dc87d429361c4e0e485a9ab73caba054541243affb5db3ac6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9087

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=4+types+of+visual+texts PDF link annotation
    • http://rollfactorytogo.com/uploads/files/pumuginafijaxokube.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/75374517806.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093e5db05c17---30042740314.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126e8dc1855e---jevetubez.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/fewubibejatumalirogiso.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/c504c6880fb3213e168f1d2e332dafa7/55704276876.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/45637004323.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/lojejo.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077cc2f6c076---22270246493.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c587fee7ddca8d0f2f212c52622c6c0d/11171133338.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/50838684498.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/88517254368.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/46a6272b419e6ddb9fc42d30cc565c18/30187254784.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16116553265df0---75174882320.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210708_8FA1757F51FAA0A3.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/pilujoretegafonu.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b2b7f13906a5ada519fdd4dbd8f1c5d1/xifebatijofag.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/sozasutoxawuroja.pdfIn PDF document text
    • http://4bx.pl/public/file/kejajotulugibupom.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/5118830316.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/xifareza.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d3456491357224408633b59b2b465d1c/xotisexeraned.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/fc51493cfd61a4fc6104ee741591530b/gapalib.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/12936162767.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/11637989651.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_off0000e1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1