Malicious PDF — malware analysis report

Static analysis result for SHA-256 222e8ddfd99a489d…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 13:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: abe2f53154167d1556b59eabf2085cb2 SHA-1: 86dd623e8eeb89c92871cabe0a6148489cec8424 SHA-256: 222e8ddfd99a489dba8aa2b7920a3e2768be72e0438247f5aab92050844af884
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. The primary attack pattern appears to be directing users to potentially malicious websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://synerhu.ru/uplcv?utm_term=all+snes+roms+download PDF link annotation
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/9cae1410c01006be655fdfd2600f8254/19119445344.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/54451907911.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/c96dde626879cc2693275cbb8092f0ac/xuzuleninuxibapumexopupin.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/59259647922.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/wixagabasitijeleguw.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/0i9ksi2b0kqspph67flm540kq2/34214683698.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/nuzivoxazofazixogi.pdfIn PDF document text
    • http://casaalu.com/luutru/files/garifufajogup.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/c8646054b6585d4e18b0d26f906c28d0/vizaxomaro.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a086afd72---kobosokabomukifodatijuraw.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/dobijujil.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0860ba0a8---92304294541.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/439320de83e8ca7cd5a0d5707d45a6e4/53576594375.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/r5iuf61mrrakkvj0i8fh0kvn1d/pepudaxukasuwomikebo.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/etuftlabp2r1kejfb49dqnth1k/xonepiw.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/midixusuruleferarareg.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/87217000948.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/97855188508.pdfIn PDF document text
    • http://ahchala.com/img/file/57698843708.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/lebaza.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/h36b9qeudra2lviq0m6p8fi8t3/lomotava.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/6027ab18d8e1a53d2cdde562af29dd67/widofadewenumorov.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/68203223422.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb16b737c7---71640484425.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/f2417c54610e1e3a5606f26076b6b5e7/52995111942.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_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 19360 bytes
SHA-256: e2ba0c7f1bc4a62d287d1b61533bbc93c0f7d73f3cc1c825e2df214134366740
font_01_sfnt_off00011c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A9 10284 bytes
SHA-256: 6e6fec029a44e864acc8bbd36a86da32c0ed6b87c31fd67b34411930c06608cc

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