Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0882cea417ba2ac…

MALICIOUS

PDF

73.4 KB Created: 2021-08-08 17:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7e927c9df53dcc0cd6a6e2fd49012bec SHA-1: 6e7d916b60b3bad7e4f2128a13b7c98b0b2d4c93 SHA-256: e0882cea417ba2acdb65e421f43431753bd26cf2d9af94774d55f31c394b93c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9308

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://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/d60ffaaabbade7ec876850e02ce80bfb/gewetononunoramusepex.pdf In PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608adb35208f0---wotubuteruvodudefabikowog.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/1973528124.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/jelikilumiz.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/29424143692.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/1918891075.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a43f315ced8---vuvamemulaputimewumusup.pdfIn PDF document text
    • http://zuche0551.com/upload/file/begaduzawu.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/u7jnv8drqbifsuchsneqn2h11f/14505284007.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/67973091818.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d78be3a45561e63f9c16e648613d3d3c/79593139301.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/80630058947.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b0203b1c6c8---47214287395.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/rozekavuf.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cef7260cc---45022484507.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/59758423847.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ea5099e65ae5feb245ed1406f7906ad4/vunulijaburas.pdfIn PDF document text
    • http://www.ujepites.hu/userfiles/files/51347903145.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/varipi.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/senav.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073aa9ea8170---48840564312.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3a4bbf9e9---dafolure.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=is+cheaper+than+dirt+goodPDF 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_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 10700 bytes
SHA-256: 8cbdba1fd97f3f1ee4408f70d3c42853258c7f00b24a7e5ee709aaed9b4d1c6a
font_01_sfnt_off00010b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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