Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d22017948bd0043…

MALICIOUS

PDF

84.7 KB Created: 2021-09-15 23:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52978cb85c7c74e62373005c62dbd449 SHA-1: 151a04e308b0613f281f6d4f856ca47187c46e12 SHA-256: 1d22017948bd0043b9426908663f8e11a18195a13fd69f44dc3043ea72d2904c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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 https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/df43e303cc9597924316190268d25fc6/19095348497.pdf
    • https://vieclamday.com/userfiles/file/boralofawoz.pdf
    • http://albarossa.jp/js/upload/files/93275761724.pdf
    • https://pachetedeturism.ro/images/files/52672687465.pdf
    • https://grafconsulting.pl/Upload/file/gokibitirewavite.pdf
    • https://www.paseppe.gr/ckfinder/userfiles/files/posumiwasapinagalari.pdf
    • http://www.julietlandau.com/fckeditor/userfiles/file/budebov.pdf
    • http://www.almansori-ye.com/almansorifiles/files/16898161082.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131da9a3b8fd---46269022522.pdf
    • http://www.astmalek.cz/obrazky/file/31235980033.pdf
    • http://humanlitech.com/files/files/bumafakirobifer.pdf
    • https://szaniterplaza.hu/ckfinder/userfiles/files/14244090618.pdf
    • http://benevolo.it/userfiles/files/3992018051.pdf
    • http://martonelektro.hu/files/file/bumuw.pdf
    • http://modernplating.com/userfiles/file/70722223680.pdf
    • https://keralahappyjourney.com/ckfinder/userfiles/files/64351161083.pdf
    • http://hadt.vn/upload/files/tozixozuk.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132b3d5ae9dc---nanuxexofolofefisuxijazu.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d44ab130e---61518051364.pdf
    • https://globalmediaminds.com/uploads/files/1325454027.pdf
    • http://archgeo-leszno.pl/uploads/userfiles/files/71933013645.pdf
    • https://yennenga.org/business_school/uploads/file/libixikewubilejewef.pdf
    • https://grootformaatspandoeken.nl/userfiles/file/75649856700.pdf
    • https://sabagdasarov.ru/upload/file/54737758931.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ardab+mutiyaran+watch+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ac.bin
2d6e94f8a1624ed18560f6db88490d92d1911ce36b871d3e4e3695c4a227f6ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AC 18168 bytes
font_01_sfnt_off000113b8.bin
5416c8c41a61d6b6d409f6c220e82edb548a11cb06f6d34cfe838db61ec1a129
pdf-font-stream PDF embedded font (sfnt) at offset 0x113B8 10888 bytes
font_02_sfnt_off00012cc9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC9 16792 bytes