Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ce8de998a275b0…

MALICIOUS

PDF

65.1 KB Created: 2021-07-15 19:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 78aa3f4f74f70f9016f71d239f1ddeec SHA-1: a264d167607448272138ace3bb33621421977aaf SHA-256: 16ce8de998a275b049e36d020a6589d2562f68f144be1bac24c79e21b0f46873
124 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. The structure indicates a link farm designed to obscure the ultimate destination and potentially leverage SEO poisoning.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4984

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/62b79af55f89e9104df1482eac479fe0/bejijetezuvizi.pdf In PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/7ac36e1fed96cf5bb5d07b9a59837876/luzofi.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/427907d9297e8420cca802b2293ec2ab/48681163233.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/wujetadupikegezawavexani.pdfIn PDF document text
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/palefoxojax.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdc656bc56---68240695912.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/8c122af9b8aea589ebe518a0ba3f48dd/7577160428.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/c14cc2e34d51992d1bed23d99e4375db/fojafabuzadedukukunizeka.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/736df83cf30d9b1a1f95544af400078e/putopufakodoropibazives.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/jeginobupoguxuxazera.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/322c74d1cfb141c3f9d671ea6debf776/33623315116.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6a85bc2b4---zamuwoxibefevixevuxukebem.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/c9809095f08d638140993f477f07e0b3/72674194158.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c673306f6b---75464937291.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/18908003329.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/gogikori.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/c593c67139dc6b14c58017220aef17e7/33378617354.pdfIn PDF document text
    • https://congchungnguyenlieu.com/uploads/files/midasekikitizapogawa.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/51592254714.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/8b1c6a1da3459e64e456081098d011bf/ritokozunizaku.pdfIn PDF document text
    • http://computerdoki.hu/user/file/2517545197.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/wuwexotowoxidiwegirijepa.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607807635f7e6---pagataxivirajunazapi.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/30247238951.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871ee4028f3---dejasoziloge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+necklace+by+guy+dePDF link annotation

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