Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d228ef8a7f65b3…

MALICIOUS

PDF

78.2 KB Created: 2021-09-18 01:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ceca5c96df3533cb9e71225fe731173f SHA-1: 1b7eef9b44c1a99fb20a7e309631d48b36a5ab04 SHA-256: 17d228ef8a7f65b334470a914b946134879662ec7c0f1edb4d8413255c9fcd82
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to malicious URLs, as indicated by the PDF_URI heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://dabanbep.tanglehadong.com/upload/files/26604553625.pdf
    • https://maria-galland.ru/files/file/folexevizekajezumop.pdf
    • https://www.disbel.es/ckfinder/userfiles/files/92275107827.pdf
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10586954715.pdf
    • https://tatsolarlight.com/uploads/files/tasad.pdf
    • https://detector-billetes.com/Imagenes/file/81644481377.pdf
    • http://julianina.de/upload/file/94460364133.pdf
    • http://vswet.ru/f/42872802037.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/kajibowezukepujugivozaz.pdf
    • https://bcbc3399.com/upload/files/dofokidojetixik.pdf
    • https://gilboamedia.com/userfiles/file/2505332015.pdf
    • https://digireg.it/upload/58581128789.pdf
    • https://tiemhoamo.com/data/dulieu/files/natavobudarigub.pdf
    • https://wic-net.com/userfiles/file/26826137648.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/o40kgon34qfc5kumnhlelslim2/11729560377.pdf
    • http://celcg.pl/uploaded/file/xomefufumiwowokod.pdf
    • http://elturo.ru/img/upload/files/38317139108.pdf
    • http://bsa-billiard.by/images_from_html_editor/file/nagunawilixo.pdf
    • https://pezenasenchantee.fr/userfiles/file/78810595442.pdf
    • https://longhoang.vn/upload/files/tarirofesojekepuf.pdf
    • https://gosselindesign.com/images/from_fckeditor/fichiers/zoderutomut.pdf
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/paguluxipoxetorifo.pdf
    • http://xecuoihuyhoang.com/uploads/userfiles/file/91058319686.pdf
    • http://china-guolin.com/filespath/files/20210913102826.pdf
    • http://a2kat.ru/userfiles/file/21888432022.pdf
    • http://xsjprinter.com/d/files/zobosokujugubawirujamomag.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=android+email+signature+image
    • 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_off0000d0fa.bin
12e7781822eaf48bc228fe9069b950bccb1d2abf0c9c5d04848407ec310a1500		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FA 16300 bytes
font_01_sfnt_off0000fb20.bin
37d05423bd6c4d2d092aece7f4fb6c3e03c227ca44df64ffee6416d3a24f0318		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 10672 bytes
font_02_sfnt_off0001135f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1135F 16792 bytes

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