Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e98002479908d0b…

MALICIOUS

PDF

83.1 KB Created: 2021-10-08 02:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ebb30bf28c606491bfca468bffc13c38 SHA-1: 3a73b40daec0b791ff5b37dc2ebedf61f6abf44b SHA-256: 3e98002479908d0bf1cbdf064407bdc8ef052f527ce2bb32aad7201d465d6f98
104 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates that the PDF redirects to a collection of other PDFs hosted on disposable domains, suggesting a phishing or malware distribution scheme. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2548

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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 http://tropo-design.com/ckfinder/userfiles/files/45138817036.pdf In PDF document text
    • https://xtremefitksa.com/ckfinder/userfiles/files/raxibav.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/57536624913.pdfIn PDF document text
    • https://12shio2.com/contents/files/6638918020.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/jajunujegazidebalokoga.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/jezowizolubibefuza.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/31964346813.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/92451094103.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/gimulisifadegusilidevox.pdfIn PDF document text
    • http://acunambalaj.com/adenoto/upload/files/mesanujaruzenokulog.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/haj09oq81v80479eb7mi1sulm6/misodakaw.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/dakoronibami.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16134c0d18ed2a---jirapoxewogoja.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/15453020296.pdfIn PDF document text
    • https://avukatwebsitesi.cicasoft.com/upload/files/kevesamu.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/60330167787.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/27712150391.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/16693753904.pdfIn PDF document text
    • https://ecosolar-energy.com/piceditor/file/63878647787.pdfIn PDF document text
    • https://webrobogo.hu/kepek/39681520867.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b497c431cb---73435462998.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/68825284159.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/47696700706.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=chai+mulled+winePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 19748 bytes
SHA-256: f702937cf24eabfc20eb14d88e95071fe2fbda305585435788ec5250fe4f2511
font_01_sfnt_off0001199e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B5 10244 bytes
SHA-256: 343cb4b0c2b7718b0a2fe8003957d615117a9c7dc6ee9be1f3505645b235c1d1

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