Malicious PDF — malware analysis report

Static analysis result for SHA-256 3673c2000b80d0b2…

MALICIOUS

PDF

82.4 KB Created: 2021-08-08 18:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0d935262986e3df206028948c06c7396 SHA-1: 0506ed672d94bda4fd81508e473f0e877f3c7aa8 SHA-256: 3673c2000b80d0b27f4792cdf99fb85a082528a2e0e8a34d91f5c0e4cbc68d2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to various websites. Several of these URLs are hosted on compromised CMS platforms, suggesting an attempt to lure users to malicious or compromised content. The document body is unreadable, but the heuristics indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8605

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 http://mt-filtration.com/uploaded/file/149110120460befaaa0647d.pdf In PDF document text
    • http://starrwindow.com/clients/863399/File/26664696574.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/jinodo.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160756ec4eb543---58560727619.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/kovafumibavesavidokineliw.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/3fbf3854c746bf12dcb5f7f8483823c4/zuvuwesabugo.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3f70ca68f---81434054344.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/65344447104.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/37vi4kobnoqiuhe5s8me2fjcb1/nozivedajajasofuk.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/868e966e4ffcff63d33c928ab625bd48/57647570293.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/kopusimegomi.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/worojif.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/40287101020.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/089c7af79ec2fe762505f245d732e1bd/bumirexipajunadulak.pdfIn PDF document text
    • http://brlairport.com/images/file/puxinusino.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/48962823333.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/86765163888.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/8b8cb0947c7654ed14041e005c3f4c11/90985272083.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/570s29up3q1slhpjsjhl0rhj38/bisozalajoxolofejiga.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/cc0dicu6q434h1g4ji94sdott1/63554035470.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/csk56gqi224q87e2dplcupcvut/314032943.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608025b2ebbf5---31847729246.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/e7f93ac95802e597ea59a93a03fee6ff/93303378196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=everbilt+pedestal+sump+pump+manualPDF link annotation
    • 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_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 10720 bytes
SHA-256: 161402956aeffbe426dbe4a5b15f17338f6eee9221b356b866ba58402549329c
font_01_sfnt_off0001088a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088A 16916 bytes
SHA-256: 38c1f46e90f29a7a746d67331e1073cb8ecd039a9987bcdfad1c3163e53ad76c
font_02_sfnt_off0001343e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1