Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebaa52b5a6007ec9…

MALICIOUS

PDF

113.8 KB Created: 2021-10-06 13:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5afc245fb46acd31856c21eaf45e28d7 SHA-1: 9b67dbcf4db97f8b521cfeae25d7e31949131c7a SHA-256: ebaa52b5a6007ec93821087b8155053b7b4fbc88f9dd02f3ea67ca271531418f
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable domains and compromised CMS upload storage, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs are designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5044

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
  • 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://volamthienha.top/userfiles/file/98310909258.pdf In PDF document text
    • http://cuboni.com/uploadfile/hong202109061002578428.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/cc7434bc93c6d587fdfa56cb7649ead8/60647363834.pdfIn PDF document text
    • https://slide-bearing.com/d/files/roliluzi.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/65642928625.pdfIn PDF document text
    • https://hiroyoung.com/data/files/3219143833.pdfIn PDF document text
    • https://tierlistei.ch/downloads/wegetexubexagise.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/pamavalida.pdfIn PDF document text
    • http://watch62.ru/files/files/36205348254.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/wexaloxenu.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/78679866250.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/80303253952.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/83031019757.pdfIn PDF document text
    • http://opersan.com/file/ruforawefemumowo.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614c64fe235d8---78068867879.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20210929180838.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9s15u1r6p5rjs33lvi5sic3erp/61247810726.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca2121fbe3---tobiwutifitipezudiv.pdfIn PDF document text
    • https://kovrdom.ru/sites/all/sites/default/files/file/watidulisaserar.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b8f7ac81a1---35074809460.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/wejawitowi.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615885b687f73---69680769298.pdfIn PDF document text
    • http://ombs.ru/uploads/files/dopodifamukinufegoj.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/mukegeziselorem.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/dbuprb24cahvgj2v2c4qpvb5qo/lidiletemeduxubokirasuxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ap+biology+chapter+9+guided+reading+answersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001736f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1736F 11384 bytes
SHA-256: fbd7a8dc4c0ee160d58b5072ea2e40cce2346adaf389813bb885fc3442e450b5
font_01_sfnt_off00018dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DEC 23468 bytes
SHA-256: 1683ce3944a29aa4d29aa001bbe6a43a5b23532d19b72ccf099f1f0f170586a8

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