Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc7142ed6496635…

MALICIOUS

PDF

39.7 KB Created: 2021-09-18 09:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 72e0343c424e5e9ca3cdbc561eda8a5c SHA-1: ac2b11031c8688a5c710556c0a8e1f9b461ba471 SHA-256: 6cc7142ed649663562f97b31bbdff03a8773628cb67e675d262a3577663686b2
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs a common image-based lure, presenting itself as a screenshot to entice user interaction. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving the download or redirection to malicious content via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9757

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/uplcv?utm_term=edit+song+for+ringtone+android PDF link annotation
    • https://cabsfromheathrow.com/userfiles/file/fugogexawasasonaxofufipus.pdfIn PDF document text
    • https://haidangpc.com/contents/files/85611508905.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210909000151.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/tagamavapelukezosapesun.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109101102419886.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/8441133794.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/jubejuvapodixatuwekivor.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/rafisonagi.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/munuwakugiwekuliwijol.pdfIn PDF document text
    • http://euroambulans.pl/userfiles/file/75224174252.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/53170111215.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/1d51978b4ef80362fc8f0904d1d3ec1a/lijuwonuxovizamufopuw.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613027d1154d6---58165563543.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/32662969325.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4575e2c16---35263643192.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109091257094143.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/99921894912.pdfIn PDF document text
    • https://menu2uplus.com/images/file/12466194139.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/19027511047.pdfIn PDF document text

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