Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70bc98f4815e284…

MALICIOUS

PDF

41.7 KB Created: 2021-09-15 18:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6799b9b2ab3c39b00e1dc61c81177e2c SHA-1: d459aadcf6ef1e38deaf0fbc3b312ef3d0dfcc81 SHA-256: b70bc98f4815e28480b6a4f2b3d53ee1be7eaa809e1efe683acb3a46403e1500
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. It contains a high number of external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and appears to be an image-only lure, a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

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 41 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://oreopay58.com/ckfinder/userfiles/files/92275316651.pdf In PDF document text
    • https://support-trevianum.nl/userfiles/files/38706997303.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/kapeliw.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ab921702ac72dc8ad7b2cb819e77ef4f/jafukazaluwijetizaxalizi.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/wukutaxamukozikuxabomumu.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/vixovojipazezajegigumo.pdfIn PDF document text
    • http://chinalabware.ru/d/files/52499250160.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/89713fb12607891c9b5a8773434ba98e.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/zenozilofulakitumafu.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202108312147012897.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/kawibi.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/63976887558.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/gemotaz.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/93652704691.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/ronejomobojubaxezofi.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613232a7074ec---35362748307.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16131020a83b0a---96807181544.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/79334321049.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/26678298152.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/jevajevonefuxasibefute.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210914165315_1363054817.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/7942845091.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/60508313774.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210901050109.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+have+2+accounts+on+clash+of+clansPDF link annotation

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