Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a08e721e6ea88c9…

MALICIOUS

PDF

88.6 KB Created: 2021-06-27 23:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 672d71ecc7b0cb494af3f542da074249 SHA-1: 4a7fcfc4847460644a114cbf20c1a1801df9c82c SHA-256: 3a08e721e6ea88c91f319c6bdb9386f66e4e60c038576588851d3d55ff895c1e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of external URIs and compromised CMS upload links indicates the file is likely part of a campaign to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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://chcial.ru/uplcv?utm_term=meditation+to+calm+down
    • https://aldurra.ly/images-editeur/img/file/65095138858.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c480783351---valufavam.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/238064e4318539e1d86a2f7e9150b7b6/kigonakojugob.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/3smgo6ph3a1bu3gqsag9b2d2k3/94290738004.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf9d637982---sozuvofevenaxib.pdf
    • https://skinrepublic.vn/webroot/img/files/lukatoli.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877e99b6a9f---pidivomobejonew.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9fee7054a---buvim.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/d252101b82bc8d9b1195912dd127d749/tadilozefub.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/8959c74539b9e2f2a245e311744e2b70/37596429465.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/2131e7b3a2a4d652840ce9cbc196c7ca/juvedelifabimumogipil.pdf
    • http://ledson.ru/upload_picture/maliwokufo.pdf
    • http://bizbecho.com/pa/trainstation/uploads/image/file/29991174595.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160956c63a36f3---49009341660.pdf
    • http://kowel.com/ckfinder/userfiles/files/1623116934.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608daff66cf96---buzagokilufal.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96d4a80bd90d06294a83c5a30d0d8bdf/vazowi.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b311fbc5edc---kajejisib.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2df8797718---fugeruvepabigifawudovun.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a878d7ce094---selalonexot.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/841c81706d990cb1ec1da9827be85e96/83715204627.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9412b33b0---10679444576.pdf
    • https://whitesal.com/data/images/file/8753_20210519165531.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a586a62522---18135626754.pdf
    • 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_off0000f68d.bin
d319b088f162e706a549d3cea1e6bb44fec3fc4044676002083c2c9a3db1fa9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 18100 bytes
font_01_sfnt_off000125de.bin
237f85490acd5841842186790ffe861a49c95bd26626ad166c0f573d335cc3e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125DE 10344 bytes
font_02_sfnt_off00013d3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3A 16792 bytes