Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b6da4dc5eb350c…

MALICIOUS

PDF

66.5 KB Created: 2021-09-17 13:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ba05949ae46ac56bd88abe24bf14d120 SHA-1: 0980598962b251b96f3e0721e9e99a7ac8ee8e0a SHA-256: 87b6da4dc5eb350ca97ca153de335b996a2d433c6fced863fec3dda15a30d31c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple unknown-reputation URLs strongly suggest a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file, indicating it is likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6765

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://archism.ru/uplcv?utm_term=download+dls+19+apk PDF link annotation
    • https://jamurgoreng.net/contents/files/8139956839.pdfIn PDF document text
    • https://menu2uplus.com/images/file/xezobadodiroje.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/26266577685.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/putilu.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/98564038849.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/guxupijem.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/43462631454.pdfIn PDF document text
    • http://mdtrend.hu/files/file/xubela.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/49209931809.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/xumalaresur.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210902141808296.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/75770723410.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/44330251792.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/90989279138.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/93675932970.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/rafeponofivisogumixil.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/80995061566.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/51bd4333527431502683fdc9994463d3/bixejisutuzipexapuxo.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/zutofefebaka.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/32022938917.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/kodokadasotivojoz.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/vigufa.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/tonuzawapewifabuvazedo.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/dinegavawizelopotekitar.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/podosizaludijerixeluzodid.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_off0000d16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16E 17868 bytes
SHA-256: 4c765475279f818997ee9226da0c5ad460d8a3d9ad55593a0a37e40c0f1e3c00

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