Malicious PDF — malware analysis report

Static analysis result for SHA-256 227a30492f7a3756…

MALICIOUS

PDF

37.6 KB Created: 2021-09-25 20:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d1327064f520641da3b009ee6385e77b SHA-1: 628232ce18b6d610ad5b29c7db5f197d9082979c SHA-256: 227a30492f7a3756ce4cc7d4413d3bf7ced7ed5314a7b2274b094d63e08c40d7
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs a common image-only lure technique, typical of phishing campaigns, to entice users to click on embedded links. The presence of numerous external URIs, many of which are structured as link farms on disposable hosting, strongly suggests a malicious intent to redirect users to potentially harmful websites. ClamAV detection and ML classification further corroborate the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7966

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://drafthe.ru/uplcv?utm_term=exodus+iptv+apk PDF link annotation
    • https://weldingportal.it/userfiles/file/jasapita.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/kajazuwixum.pdfIn PDF document text
    • http://youzedu.com/ckimages/files/20210901124856431182.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/5485e0ba03dbbcef4cd73667f9aad011/dizopogijaniresuzutak.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/duxowagulaxutorigaxow.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/52476301088.pdfIn PDF document text
    • https://phunhai.net/upload/files/tikozajanu.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/konaz.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/kazewepuxelokowakabodadal.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/serobifejomubat.pdfIn PDF document text

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