Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0d6853c6fdfeac…

MALICIOUS

PDF

60.9 KB Created: 2021-09-16 16:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f082c8816baf0bb72841b0683bafa223 SHA-1: fc588882acafa9089d744472626abbb77c46c533 SHA-256: 0f0d6853c6fdfeac9142b2e76323538f65341a0b9108ed760e1fb6fd45dff507
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6780

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=how+to+send+files+from+android+to+macbook+via+bluetooth PDF link annotation
    • http://186086.com/upload/files/45722089137.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/zotoxoratolukalufovinun.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/22465133781.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/movaziwo.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/161334c2dc2d28---fexokebelufegototupave.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/40386890939.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/lenem.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/5629130240.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/bilirikajefisalu.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109080247058293.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/13422076937.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/vugir.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/66752528164.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/wevonedevikafekodomezida.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/15921598471.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/jubibakaraxobemuzezigal.pdfIn PDF document text
    • https://x-software.cz/data/file/pusasoxoduvusunixideveru.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/menitojapexaz.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/86811849979.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/lopidojetumanikir.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/biwobumivumugu.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/fujupimizud.pdfIn PDF document text
    • http://favorit.pl/userfiles/file/74879371903.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/bokivafagupojobodineg.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_off0000dee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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