Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed47f1c586395081…

MALICIOUS

PDF

62.5 KB Created: 2021-09-14 09:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f8cacfed954454d514f46df0928d8e51 SHA-1: b1d648dfce94e9caec29c1352d31034112108b8f SHA-256: ed47f1c58639508178f3551924a4398cab3023e4de22aa0514c93b4b1b643c4a
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of a link farm with numerous disposable URLs suggests a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, but the heuristics point to the document's purpose being to redirect users to external sites, likely for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

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 http://piqiso.ru/userfiles/file/32149169330.pdf In PDF document text
    • http://soft-pro.hr/upload/datoteke/dugitazofeviginubipuf.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/41026698525.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/74923073968.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/38930091153.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/kosoxumerasenak.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/17958433867.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/tigatujutagidoxodeta.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/64885484631.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/8b2e4a151ecc687129ac21d3678e22d5/4682326869.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210905022445.pdfIn PDF document text
    • http://djapm.com/userfiles/file/34751168520.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/vizikazorirekod.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/22272214045.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/6912798812.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/daxerenevogujul.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/vubezobuwepozi.pdfIn PDF document text
    • http://om-ar.com/userfiles/file/famibot.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/sitifafozebifaxa.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/36277738714.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/togazab.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/jodikinagevalabunokifeda.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/99798347179.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/83604108870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=forza+horizon+2+download+android+apkPDF 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_off0000bd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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