Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb1a49dff343954…

MALICIOUS

PDF

76.9 KB Created: 2021-09-07 00:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 25dd56c3c6a67fff638a2ebb7c7b5c3d SHA-1: f90fee9c23edc322dc55e9b1c50695f1f1975161 SHA-256: dfb1a49dff34395411e818e981a29903f66ba48842c7404ee65c77300c4d69ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable domains. These links are likely intended to lure users into downloading further malware or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5734

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://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ccab09063b298c462e794ebad34e1e7/19573060202.pdf In PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5de86a372c---xafumorawarovo.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/78561722454.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/44135707744.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/gofaxoreranud.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1575c0a3d5---35014368771.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/66031393061.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16086d6b55f22e---savefokenitaxor.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8ce175e6c---xomoxif.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/xamegazofowitox.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/mogesamilozuwosexepofa.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/jezawogi.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/biruvofi.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/68983919492.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a13c66848---pamekigapu.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/didutejesuzem.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/89122d311da14a765f8c71bf6deeab76/zekomozebefodixenuluj.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/079562fb5f9bf2ee32a1868e2a00f532/dumesanogu.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/94633856530.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/16115467030.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d241082fe14---84509344350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=semiologia+pulmonar+auscultacion+pdfPDF link annotation
    • 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_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 11136 bytes
SHA-256: 7c932a3dba162958f53215b9ce4fe648326cbfcdb660a23bfa9a72acd3863aa2
font_01_sfnt_off00011870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11870 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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