Malicious PDF — malware analysis report

Static analysis result for SHA-256 c301035084a19a89…

MALICIOUS

PDF

81.1 KB Created: 2021-09-03 16:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 12eaffa490a765f59c85704b7ea18bd3 SHA-1: 38fa2b2b6fa93c9bc202a75fb88e2ef063794144 SHA-256: c301035084a19a89b3b8f96bc907d775e582b47c604b0082620da3b00df51c3a
154 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct textual clues to its purpose beyond what the heuristics indicate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7862

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://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f20e25aa20---30789862377.pdf In PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/c76b0bc261c7059f37f94bef914b1c97/senun.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/murabowutal.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/komabetuguzarazamu.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/xudada.pdfIn PDF document text
    • http://usmleworkout.com/files/file/bijezomamela.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/63c70112c830882fb84c7cca486402a2/24455164899.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de0425da48---sanewuzufirajejo.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/mapotojisavamobifobejigaz.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/getivexopovuta.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/76748999996.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/fj4qvnhifr41hkijekfe775uc2/ladafobijoviwidosexawat.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07c436e61---53645659607.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/98131365040.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents//files/rotolujegubi.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16292082834351.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/65412111920.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608098867bdec---25569816593.pdfIn PDF document text
    • http://compsult.net/userfiles/file/14993175399.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/31035146079.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/xemurujuwofetegat.pdfIn PDF document text
    • https://asken.as/bilder/file/17670053142.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/dapoweweg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=dali+spektor+6+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 17816 bytes
SHA-256: ce982c627dadb7382d24227bc3419d1953448f62a2e3f67295f3eb342be0fb02
font_02_sfnt_off00012d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1E 10648 bytes
SHA-256: 587417081d0dd80d4cd3555b6e5451bb921c2558fa20b87ee1fcd9d3ae3aee53

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