Malicious PDF — malware analysis report

Static analysis result for SHA-256 93613a96f554e287…

MALICIOUS

PDF

90.1 KB Created: 2021-09-19 06:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ccb2ff18784eeb3746a274312e17425d SHA-1: 05eac92b86e5211c318034b79c0083d50baa4990 SHA-256: 93613a96f554e2871c5c73e93c1bcbd2d85a238a3bc7a5cf7265e94adb0f55ce
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. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The primary URL identified is https://coretry.ru/uplcv?utm_term=easy+video+cutter+pro.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2664

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://coretry.ru/uplcv?utm_term=easy+video+cutter+pro PDF link annotation
    • http://www.jfac.kr/ckfinder/userfiles/files/73624010861.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/23045767228.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/wevomodolug.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/11872345827.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/90178953008.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/mulozariratuwiletolufuwu.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/xutisapepi.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/59480841743.pdfIn PDF document text
    • http://chiron-ventures.com/chiron/home/img/upload/files/2109061155400026351f5gk.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/texit.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/44919782425.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/kuzijoralako.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613caab7e74df---87287502806.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/62226124150.pdfIn PDF document text
    • http://vina2002.com/uploads/files/4387129669.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/67849876596.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/depufabotujabavidev.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/2a359bb824603a551d8c0a8a11eac2b4/23363233688.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/gefuzijavegikijum.pdfIn PDF document text
    • http://phutungvespaco.com/luutru/files/pujiriwipoxob.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/39581982466.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/8751995426.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/bowujeligujeranobu.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/savugojibanogora.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_off00011257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11257 10620 bytes
SHA-256: 7322e21f6bae06154324093458bc2c1d98570cde483629aafb0ec30b9c791c34
font_01_sfnt_off00012acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACC 18664 bytes
SHA-256: 50409f1b8d6b5df567efabde47cede4d78dc4875f394e55dfe5a6343db7a8fb8