Malicious PDF — malware analysis report

Static analysis result for SHA-256 af69081d2eb08ebd…

MALICIOUS

PDF

99.8 KB Created: 2021-09-24 10:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb967b62322ecb2937ebdc3f6a06accc SHA-1: 37f93dc7ad77724d440091198774086480a32319 SHA-256: af69081d2eb08ebd7dd5110a5ff513f9e711d41c25757396b9a30f58612d21c5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a significant number of external URLs, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript points to its use in exploiting PDF vulnerabilities to execute code, likely to download and run a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://oniceh.ru/uplcv?utm_term=rich+dad+poor+dad+free+read+online PDF link annotation
    • https://milliondollardesiclub.com/upload_files/featured/files/kanegudutosativodix.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210904013530.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/30547201078.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/40991809946.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137fc56b42af---5853426273.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/56652768253.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/80436062170.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/morukulajivatala.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/duvomudodovenuleve.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/vujizawasasisibis.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/xironovevonasoguwor.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/42d6c444759d1d9d789bed1bd00c847c/73568375060.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/62889051474.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/xawozapezimovebamumali.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/98207993032.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/86053537385.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/gomibubuligapagepo.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/jigikizizofipux.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/rosepilizitadujebixof.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16149d859b6beb---3737208975.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/pakokividonadexodom.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/27613424505.pdfIn PDF document text
    • 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_off00012149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12149 18364 bytes
SHA-256: fda5eb1be1dfdc365d4509bfca0904b9f797b90f5a7cc4b596cc1dfbac9162f7
font_01_sfnt_off0001519c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519C 10496 bytes
SHA-256: 1137f5043f0bdd860b45f423ffd67a26193fd393f495093af3f899d791884795
font_02_sfnt_off0001695c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1695C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.