Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b39f2d52b98a9bb…

MALICIOUS

PDF

83.5 KB Created: 2021-08-16 20:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3208e7c963a25ff93664de0e23066248 SHA-1: 1a711c4ab367e1402d82193a4bafa58b819d89b4 SHA-256: 1b39f2d52b98a9bb65104fe185635acd63a1736d48ba16d89da18f2e57087082
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains embedded JavaScript and numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of a 'loan agreement template' lure in the URL parameters further supports a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd509020d---77025212159.pdf In PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ff4f49970---sopigusumimewuki.pdfIn PDF document text
    • http://viajesalaos.com/webroot/img/files/13551011716.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/263c80100d6b2d052d4298b346a892e4/bivezedaxopomaz.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/60813627706.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/89771654455.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115e8249a68a---75130021548.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/jebagabilinedadipemusage.pdfIn PDF document text
    • http://sowitech.vn/upload/files/28062920797.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/tb9dfmi9dlh7sfr1u8gq7bqqg5/gakudo.pdfIn PDF document text
    • http://abpaluso.com/upload/file/wutapufetujikesoxalozom.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/litigulutuvesefevurig.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37567394811.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b2289eb65---pawisedelugoxatokapulerud.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/limem.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/lerozevipipimumor.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/jeron.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/e421c6254b6a4c550f8b2a53615c5422/pefuretegukoneg.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/7ce8cce351abef0b5ed6350bbf100986/bapipobamalisugovuve.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/17881043955.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/virifosabawuzitixodakizos.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/56329305149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=canadian+loan+agreement+template+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000e1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C5 10704 bytes
SHA-256: 6d67015320d2aff7e284c464515755612033c95d79158dea2fe9e0b5408f94b9
font_01_sfnt_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 17412 bytes
SHA-256: d36fc3bfa3b74b6efcfcbd0e07863790868f3cbc82b5f432efdef1025e0a9ef5
font_02_sfnt_off00012757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12757 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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