Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a0304a1a92d5ca…

MALICIOUS

PDF

82.7 KB Created: 2021-08-18 06:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b1d308bc3adc2fa117b6af7b9a0277ac SHA-1: 5e21e3e9cd412cc9562bf8976519ea6698e23895 SHA-256: c7a0304a1a92d5cac9fa4fcd33d16bcd307ac70cdf1b247a08a4097617d8bf96
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, indicating an attempt to execute malicious code. The PDF also features a link farm pointing to various external URLs, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely serves to redirect the user to these malicious URLs or download further payloads.

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://www.bmo-agencement.fr/ckfinder/userfiles/files/wokolujirizek.pdf In PDF document text
    • http://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/jafasizonudimulumifamof.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0f04b38c81dacde999a7d8b8add66c40/67616829069.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/104b05ef586db27554764f235cb26f13/3522856611.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fc4a1aabc---zuxumazudex.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/21cjieai27e6orrn92ovedc426/24570224401.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/42021926027.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/6483714113.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/raxikagofude.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/f5e29b2c24a1a74b4d77b7015872f88c/35506019426.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/93826337726.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fb103f171---60457153894.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/kemiremizuliguko.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/18290605288.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16c7f21c48---larijoganulamavuwox.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/jezoraraketededamesataxo.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/72150816228.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/pt4j6leborb8q42vs3lc186425/58325830854.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/c817e10832209956a126bbdd82176d59/vujidifuzasu.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd1b1d0ef---13246245962.pdfIn PDF document text
    • https://olterus.info/contents//files/72844051558.pdfIn PDF document text
    • http://hotelstrack.com/bot/ckfinder/uf/files/buvonu.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/11794867473.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d6c3af8b5---65747512292.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=compuestos+organicos+saturados+e+insaturados+pdfPDF link annotation
    • 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_off0000da6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 18492 bytes
SHA-256: e2c4b68fba879529899d25e39b40b1a59b0c0bacc5773560d5d8a392270ff881
font_02_sfnt_off0001219c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219C 11048 bytes
SHA-256: baa3f8cdb380c5554f154ab0b74a7f6a820a340944d00da27ed6fe51651b8a1f

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