Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee37da0c9e67f15e…

MALICIOUS

PDF

70.3 KB Created: 2021-09-11 04:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 540d7a301172fee54431fdfe55f49a1a SHA-1: cf1fa7ae72976245c29a46739895af97d52c3ce1 SHA-256: ee37da0c9e67f15e12b61406a55fffecec33daaad7a07b96fcfd6eb47c5805e2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or redirection attempt. ClamAV detection and ML classification confirm its malicious nature. The presence of external URIs suggests the PDF is used to direct users to malicious websites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=banh+bot+chien+trung PDF link annotation
    • http://heatexchangersolution.com/upload_fck/file/2021-9-6/20210906213236221908.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/10214031299.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/92216045348.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/9693540489.pdfIn PDF document text
    • http://scantech3d.com/files/zobepidegudetudado.pdfIn PDF document text
    • https://meritumptt.pl/dokumenty/file/16113559.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/wowokizazez.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/7992826294.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/gosatakuwuf.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/pulaxerilezofetajim.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bobarobixifisovo.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/94232268052.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/72071046535.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/76234726653.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131f420e0881---41495893201.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e85e12e972d314e260937a179b2fc1f4/wakunuso.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/33588013632.pdfIn PDF document text
    • http://punaide.com/userfiles/files/zuwaxifulasaz.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/25662535742.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/zexafezomufadunevodog.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/woruwofajusawejabale.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/pakugadubaxagaper.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/janone.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/5939279985.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_off0000d422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD422 10588 bytes
SHA-256: 8315383c00f906c22db343131df14fba7290ce3a69c34942bdb236c4a9a7dae4
font_01_sfnt_off0000ec4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 16132 bytes
SHA-256: 071bac7a3a90310621307d68123817e30fba7c89f9e5021c4391eb43bd8b9137