Malicious PDF — malware analysis report

Static analysis result for SHA-256 5133cd7d1e752fd9…

MALICIOUS

PDF

77.6 KB Created: 2021-07-02 04:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eda6df5b8458517fc55bd48769b41bf5 SHA-1: 054a6f0ccde772b20d85b39c30c639939a656e58 SHA-256: 5133cd7d1e752fd9475b864f172785db070257bcac7d14ee72d32f3057300327
124 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ClamAV detection indicates this is a known phishing or trojan PDF. The primary purpose appears to be directing users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4752

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://crysiq.ru/uplcv?utm_term=famous+chinese+desserts PDF link annotation
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bbbf49652---92166591068.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/zosumajizojijujedika.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b12c83768---99652015925.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/tarowojopojusugiraxedolir.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/bb976a8d966b34090dac78034d431766/xewirozuzasizurelezeju.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/toxabuk.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ngak9bnj8vjl4tvse225fipgr5/63046561836.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/jarike.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/kazafabedeberovi.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/titifokesuvilatonagemise.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16080cf8c03e78---fakurekaxuribavawubi.pdfIn PDF document text
    • https://amblamy.ee/upload/file/migojoratutewiromi.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5d60518ad---piwalimi.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/38507974142.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd8cd5467d---61150087227.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/rafawedavilomazuwavufuz.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6fd069033---15810891174.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160840c94d533a---kiwarataso.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/80cc6b02aa17466198991474f9bca21e/gazumaxuwunubewedi.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/nedasetadubanoti.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/wotanari.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/89e66b2beee3181a4f4605861f24a226/bokanototu.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210619190252.pdfIn PDF document text
    • 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_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 10668 bytes
SHA-256: 739568d4b732016f44b75c19aa4dce5e4d881b4fe959b6d2357921df4fd84518
font_01_sfnt_off00010a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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