Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e9d1f5fc8af6e9…

MALICIOUS

PDF

53.4 KB Created: 2021-09-28 06:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 856a5049743f2fd8238c0c409cc65518 SHA-1: e48a92e42b8f8b32b19975215ab8357705b2e596 SHA-256: e7e9d1f5fc8af6e936775bc6f3d5e41d50117c5525bfcb8ce0246c7825915786
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing attempt. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the conclusion that the document is designed to redirect users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8478

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://catamma.ru/uplcv?utm_term=how+to+download+apks+from+google+play+store PDF link annotation
    • https://www.idd.no/ckfinder/userfiles/files/paworara.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/40331670649.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/pupaneginunudegutikiguxa.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/69662809049.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/80262520216.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/jiguvisufoxodapelo.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/voxune.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/kepadupolon.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/wekiw.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/641525854.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/sabenozena.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/88312958499.pdfIn PDF document text
    • https://estoniapools.com/contents/files/62902210875.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/81931591964.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/94037697935.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/53305674458.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137641530650---lenewebebesomor.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/biboz.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/58000353286.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/37119714600.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e1694e4d3e---5791887875.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/55136413379.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/25146881902.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/68698441571.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_off0000b332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB332 11032 bytes
SHA-256: c97e67425627bd94e8a6ec0a527ec4c60c0832f7a4734fd61d6a95945fe76581

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