Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7e037e22b6f215…

MALICIOUS

PDF

73.5 KB Created: 2021-09-09 11:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: c65609ed6aba7508343d62f2f47d5c10 SHA-1: f0db0102fc5e1d89886e04a06ea1b9ee4af1f850 SHA-256: 7e7e037e22b6f2152d7f3724a3a0e95236f7fcc532533cdbc40a34e62173ed97
124 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8530

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://coretry.ru/uplcv?utm_term=icons+packs+for+android PDF link annotation
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613246147a393---66568819452.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/mukubapijilonularagim.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/faxeja.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/jujafodes.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382d47d26a8---nolaxul.pdfIn PDF document text
    • https://parc-hotel.info/file/13739285288.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/94108637436.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/94264295086.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/musovabulaguseso.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/surij.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/rvoa7086bjg3curmiepp4utggl/pujesibinap.pdfIn PDF document text
    • https://upaspor.com/resimler/files/58370812329.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/tipuvi.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/59839273598.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/rufif.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/21559797499.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210903123322_mor45t.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/zajenoxajekolufupo.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/tutojuniw.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/90592647127.pdfIn PDF document text
    • http://stylekd.ru/files/27545089726.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/japojozero.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_off0000e6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF5 10380 bytes
SHA-256: 99cefb2cd46f018d6430722c8f190c7c3d4e3892c48b95762fb451e05defb778

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