Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6a1ef9a5bfe255…

MALICIOUS

PDF

73.3 KB Created: 2021-09-22 17:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 301b2c20d9e6f86c28c18305f7740d29 SHA-1: c735c555f1b834f1f9b4d6b5191a887a1a86f751 SHA-256: be6a1ef9a5bfe25574154c88152c61c1cb20d6b19f75f085ee51ce4e23c03e30
154 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content or downloads. The presence of multiple PDF links and the 'utm_term' parameter in one URL indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8530

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://cv-vezouze.fr/media/file/tokexurilomupigow.pdf In PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/82413982964.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/gotawara.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/wukemop.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/22261541748.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/ritozaduzarokakozukakag.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/xosukevopewirawuwife.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/liduwo.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/togibabij.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021091602485073499.pdfIn PDF document text
    • https://media-get.com/userfiles/files/32164559015.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/69454913393.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/93958101553.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/sonikukefetopivesim.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b98cd0fc5---rirawadukujevivomane.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/sesafijikotusatim.pdfIn PDF document text
    • https://aneri12.eu/res/file/78915302996.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/91626014026.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/f49qlrlqag27lu9e3u4dc969po/kabevejabogoju.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/46909657216.pdfIn PDF document text
    • https://tipresentoio.it/images/file/xasijitazukune.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/6d9e462a6b93928a027c0e0aa3ed6e3a/xosuwat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=among+us+pc+download+free+2020PDF 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_off0000cb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5A 18404 bytes
SHA-256: 10444eaec56f5278f6ce9ccebd113e3d82ab67b948f83703fccf2af4df30fb48
font_01_sfnt_off0000fa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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