Malicious PDF — malware analysis report

Static analysis result for SHA-256 1303824d2f15c054…

MALICIOUS

PDF

42.7 KB Created: 2021-09-04 16:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 16daf191d735da16922508490f5d3cea SHA-1: e30555de5352ec7244aa967e6a3b2e5e40a5a557 SHA-256: 1303824d2f15c054a8211edb3f026bc1155e2da8ab96abf28e75735e4680559f
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of links pointing to compromised websites, suggesting it's designed to lure users into clicking malicious links. The document body is heavily obfuscated, but the heuristics indicate it's likely a phishing lure, potentially leading to further malware downloads or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6282

Heuristics 7

  • 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 42 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88b9670b46---zajigow.pdf In PDF document text
    • http://kccmaul.com/files/files/31452783681.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ed49055bc4f---11043317907.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/lalitufixujiboxu.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/bilulipo.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/53892629848.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/94277868786.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/98258504167.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/58313520138.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/figonijipekitojivikizur.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/mipapevetoditipogenatewe.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/e41ecb26c5e47ece04f4addc17d1dcdd/munigodutudowisif.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/nvc56u0f775f922gipia54etj0/budaluvuzirozowufurilewa.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/45904930762.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/dovujitogoke.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/melijixugedatewa.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/samugowol.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/1653671674.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/958fe7c1a42b8d41d0572c84e6f05979/zupajamalosoxajuzagaz.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd9c33edcf---pewetugemiwakutame.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/gutubezajekemeliwe.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/94666221364.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=saponificacion+de+acidos+grasos+pdfPDF link annotation

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