Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44b3ca0d638ef1d…

MALICIOUS

PDF

134.6 KB Created: 2021-09-01 06:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dceced13d1e7662199be5e53e2cda3a6 SHA-1: efa599b440cc40412ae5724218b5b8546d09b73a SHA-256: e44b3ca0d638ef1d13936be48f1d1e79c7815996df0304b0277429db34f6e386
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a PDF phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4867

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://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/jj56go4lvlcmlrmgk6h32g4id5/zefapex.pdf In PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/rorafejewuziwimevuzabezoj.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/56501608685.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/1fd1d5295e91a6402a7548cc7d30be0c/divifemuxonulagefeg.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/83mpf6gsu7upa21q0ciljgeiv7/tevibegomebiwobojefozovo.pdfIn PDF document text
    • http://zuestag.ch/userfiles/files/gujafarotofesitovemujom.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/29418455437.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608640ad0c927---wenir.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/nivigaja.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43d2ef1841---72501984569.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/rg7g8ooe9h1t2cdt3o8sci11eo/46598563261.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/31035497030.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/tapuzilogusuferivudabafaw.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/32704937225.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/linotekefenore.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/warolovoxojomakaxuxed.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609246fc1fcc0---87024185612.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161059a354f56b---rawanosivekevazulola.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/buzikep.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608506232bc08---40099890021.pdfIn PDF document text
    • http://iltorg.ru/upload/file/loxapopini.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/13793490788.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d82181f13---29810932254.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/76283624935.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/taxurekov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=monogamy+meaning+in+tamilPDF 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_off0001da0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F224 10288 bytes
SHA-256: 2bfbeb3d4ddf149a77a47419dacfe6422840f508fae20f176e8d05020db55cae

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