Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9dfeca06c3ec32…

MALICIOUS

PDF

62.4 KB Created: 2021-10-08 07:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 345a5d104165e5e62cc824af2ea03c70 SHA-1: 1c169611b605a5aa1b60778755ee844ec3a978c3 SHA-256: 6f9dfeca06c3ec3204ea4ff9e77850ece7bf7760161c1651b3240f9e2b52cd45
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary function seems to be directing users to external malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=largest+crayfish+in+the+world PDF link annotation
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/gewavis.pdfIn PDF document text
    • http://wmsone.com/eimages/file/41959051322.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/gasavele.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/86154567526.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/gejeg.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132683228d8f---20342142960.pdfIn PDF document text
    • http://tiquital.com/documentos/file/xekinolegigunapadafova.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/82951782391.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/86745505082.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/buvunajirasigom.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/27955122881.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/dotimexesewutafakujesaso.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/97851054776.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/26240844654.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161542701e8cb7---misidowesajobusidoxuka.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/pukifud.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/36760012106.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/tilemupetesomejexekulige.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/1026777607.pdfIn PDF document text
    • http://elitvorota.ru/f/file/vosupagumumi.pdfIn PDF document text
    • http://s250801404.onlinehome.fr/img/uploaded/file/63908398438.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_off0000c3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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