Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0226e6b8ddcd341…

MALICIOUS

PDF

72.1 KB Created: 2021-09-20 02:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 220b8c4a2808c2a9bdc529296b2d14b0 SHA-1: 8af5e6b5cdbbf6c75a4b1d55d25e514ad7ffc7ca SHA-256: a0226e6b8ddcd341769c44fb6846a5758aca768b6e5f5703da1218ce99278f8c
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The PDF also contains a large number of external URIs, many of which point to disposable domains, suggesting a link farm or phishing attempt. ClamAV detection and ML classification further support its malicious nature, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6686

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
  • 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
  • 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://smartbrand.ro/mm/file/16786760987.pdf In PDF document text
    • https://fcimoveis.com/imgs/file/fepakekuwax.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/48280950728.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161346b312ca56---gorugajikovorobotuliwib.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/5887209620.pdfIn PDF document text
    • http://japan-railpass.info/images/blog/file/38995708247.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/raluzosakusomeruwa.pdfIn PDF document text
    • http://gapp.fr/medias/files/talawar.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/kabodilezexap.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/pobelejeninu.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/nilurowixarufuviresose.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/wawetaxoti.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16140fc27926ef---rilulipamitifonikelev.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210908_B8C630383A502DE6.pdfIn PDF document text
    • http://cy2hand.com/userfiles/48006090357.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/35261557894.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/xudenejozaxopusomu.pdfIn PDF document text
    • http://0851gay.org/userfiles/202109file/2021090408071770554.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/bubajurusoduj.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/pobilaxitenatoxaju.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/lugulozabetovuru.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/13685323814.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/fezuxinunexujiruse.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/92204327838.pdfIn PDF document text
    • https://slotsonline.ro/app/webroot/files/userfiles/files/sefotububurutitiloduvobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=download+hago+apk+latest+versionPDF link annotation
    • 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_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 18220 bytes
SHA-256: c0bc478be7bb23fa7e2e4327ca1cb0267987851153ea604a665c86fa7e59df8e

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