Malicious PDF — malware analysis report

Static analysis result for SHA-256 2faf2796696e63c4…

MALICIOUS

PDF

83.0 KB Created: 2021-09-02 20:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 007c9406d76375a42c28701320d0de58 SHA-1: 26b7c4145efc8bb4f302a47b303cc986b9ffc734 SHA-256: 2faf2796696e63c4eec7328c2f1f64495b7a4c23300d0de4ebc30905b4d0cc60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5019

Heuristics 5

  • 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.
  • 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://rotang.net/userfiles/file/nijurewofadot.pdf In PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/1550481434.pdfIn PDF document text
    • http://www.fk-fudosan.net/app/webroot/img/userfiles/files/kesufumokaxuvononapadew.pdfIn PDF document text
    • http://nebo52.ru/uploads/files/rubenobavulofo.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ivkev0p1soulsvvhav550487gd/14580824857.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/27695824693.pdfIn PDF document text
    • https://playpenghu.com/userfiles/file/83802454325.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764351c098d---13400355612.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c8ef79454---25353469186.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/jevijewakoforulorelevaz.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/61940617274.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/80054343187.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/xileripikaxuninedurunuxaz.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/jidp354g9291r0101ckmehks2i/16148781148.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/fonedinigufevezusovu.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e99c99870---sajemozajana.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/viwujewuzexopumona.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/rejezesabix.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/5bit59hjbt5jgf9ll648fkd526/81027996630.pdfIn PDF document text
    • https://noddy.nu/images/file/zisubiwexoduref.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49f353968f---10500238319.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/hjg0j9cg6441fevugb0a0i6rdq/kusijatuvukepenuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=google+sketchup+pro+8+tutorials+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD55 11236 bytes
SHA-256: b0a7383b95deeaad4bde733316de9bd97659acc10e177dca724f1d0a534af806
font_01_sfnt_off000117a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A9 18324 bytes
SHA-256: fb2b4dda1d569bf2b1c80867ed93cdc7870da50f119d85395fed5cc4cc1aaa9f

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