Malicious PDF — malware analysis report

Static analysis result for SHA-256 3210a594ed3055f4…

MALICIOUS

PDF

65.1 KB Created: 2021-09-13 14:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 33b459e9ad4c73fef1143c19826286e8 SHA-1: f8950df0b3ff3d68905fd35aa9ab0a1f02e2a4f7 SHA-256: 3210a594ed3055f49238353b9498cdde5db434387943c0c1d6dd354973dd83f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised or disposable domains. The presence of external URIs and link farm heuristics suggests the primary goal is to redirect users to potentially malicious content, likely for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8344

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://archism.ru/uplcv?utm_term=pokemon+emerald+rom+free+download PDF link annotation
    • http://pixel-pro.ru/upload/file/25971493611.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133034488784---buvufomewikadijakizuved.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/70164537422.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/nomut.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/bafiwo.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/fuwosomerazevadijeled.pdfIn PDF document text
    • http://veitali.com/upload/files/3789163474.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/rivexemoxu.pdfIn PDF document text
    • http://chapelguild.com/images/usr/98717742931.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a90cbcc2d8---nepudifazugutakip.pdfIn PDF document text
    • http://coumert.com/images/file/86983584341.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/lagitusisonabup.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/mivotuvirowilaxoziporusel.pdfIn PDF document text
    • https://kermanrooz.com/img/files/22477212036.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/62943437632.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/45583869826.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bca3a3eccd---50661729086.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109051512081895.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/66431286918.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/17552240740.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/32822609809.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/subabalediwigavivegasav.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/30323255220.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_off0000d7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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