Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fb326e3a44ab5b…

MALICIOUS

PDF

73.5 KB Created: 2021-09-04 16:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d6e67fe1bd603e0a01c609d00980ebe4 SHA-1: fa2a80426a77bcbfd05e29f90d4af9ff136110d9 SHA-256: b6fb326e3a44ab5bb7b8e9a43414adbab33f922e13d0bd8383e5d0d46a2f1c8c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload storage, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5003

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://irlanc.ru/uplcv?utm_term=democracy+and+delusion+pdf+download PDF link annotation
    • https://gruntbudowa.pl/files/file/bivofijepaxep.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/libuwivedibivurutizage.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/kozozadirokiruzu.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210724101213_1ygk7x.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/0260b76e85c45851bb90924f4f6e6286/78141367599.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/70042404540.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/46093364849.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/vomisojumodonav.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/papedatolab.pdfIn PDF document text
    • http://euro-ex.net/images/blog//file/gozimolo.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/zobarutovuxijepujanule.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ut70ki7u4q2cbidj4qaji8qbr7/45833926481.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/xizurevab.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/5ecf43f0048c8b600b78ae5724f780fb/57155505710.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/sedimoxadarozazedogonevum.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/e5bc45cf50aa8ad7450c60e2bf5db775/19944109628.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/5bfea4900aceda15373416423a1423a1/wivopasilu.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160edb832ad3d9---nixituz.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f48b8e51e1---27186719705.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/26374084777.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/91384095558.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/854f632a1f414933b1c4077dd018217c/xigubofowujabodiwu.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a59a62a2c21---73824870551.pdfIn PDF document text
    • https://senhewood.com/d/files/85256257696.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbef96bd1bd---89162186835.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/bexajevojiridujej.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_off0001089b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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