Malicious PDF — malware analysis report

Static analysis result for SHA-256 19bed430d78db77d…

MALICIOUS

PDF

74.3 KB Created: 2021-09-17 16:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4e215afcb2db1e5dc7e14d1791f3c8c5 SHA-1: 664a7d123a52aba9b53964e49e9fbae0517bc32a SHA-256: 19bed430d78db77d272aa261465148f1ed32cd451dc8a6854ae3b47c782807a5
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing malware. The PDF's structure and the presence of many external links suggest it is designed to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2255

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://pistant.ru/uplcv?utm_term=clownfish+voice+changer+for+teams PDF link annotation
    • https://escolaalfa.com/userfiles/file/77085646265.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20210906130524228.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210910095454_xb7g59.pdfIn PDF document text
    • https://cargotavio.ru/files/file/26097617817.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/56316281603.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/bubatepewad.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161417819b9034---vuzuvirivolewaru.pdfIn PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/pivadejinafipi.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/97427758265.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/60329127913.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/kamijavigibika.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/86168547241.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/12973756553.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/96485976105.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/padubonusilugomakolaxat.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/42141732657.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/jepiratibidapazepepa.pdfIn PDF document text
    • http://raczcsalad.hu/files/rameronadozegeru.pdfIn PDF document text
    • https://braus.uz/images/shared/file/sabuna.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfb3534d25---numisiketemozowaxosiwo.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/xekawazidulefope.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/60749928374.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/29351055519.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/8780657447.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/66121051904.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1631330195.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 10964 bytes
SHA-256: 8c1ec6458bbfad0a92a8a75c76bbea2bf889bea253fb1c1bd7e98e2dd0ee1de9
font_01_sfnt_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 18580 bytes
SHA-256: abb5f8753809e414c8584ce525f1141cf8bb38d1a89787ecc313c9223cb27b39