Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2506aaca01a153…

MALICIOUS

PDF

85.8 KB Created: 2021-09-09 00:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5714984e3b309b27afd75b82937c7434 SHA-1: 281db873bf5b231a707dfbaa1c8c50ac99a1e666 SHA-256: fa2506aaca01a1534ca194c6a9cd5de753ef0a1d39220bd56adc44047daa8113
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. It also features a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to obscure the final destination or host malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware delivery.

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 http://roycraft.ca/userfiles/file/17867435487.pdf In PDF document text
    • http://theurbanbazzaar.com/userfiles/file/87094949649.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/gizowipozazexileripuro.pdfIn PDF document text
    • http://stroi-sistema.ru/img/jilubujo.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613282da2739a---ponejatojasasusadoven.pdfIn PDF document text
    • http://tochalco.com/uploads/files/53879683837.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/05080f7c236624aed73cb4c16db73b85/biwuf.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/202194145212509.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/venuzeranulifozux.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/70042732575.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210903033055.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/13072500096.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/22766451561.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/fakibosuzagu.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/53981178728.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/0c733bdd653076b0843feeb9e0b9ecd5/xetipifejifuz.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/860d8eaef2d6c1db7e80bc461eefb58d/wepalumubebaxetej.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/27507186976.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/53134915470.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/ruxazalubowo.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ae9fa4331---76617779681.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/68102388278.pdfIn PDF document text
    • https://gibidesign.com/fckfiles/file/34273226593.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/41162653022.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+use+my+phone+as+a+usb+drivePDF 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_off0000e8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 18200 bytes
SHA-256: 2c00fc8bef0794116e1e3d4f4b6007a5ed83674540077c6749b3531ef89e9159
font_01_sfnt_off000117a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBF 11108 bytes
SHA-256: 1e73aff024eeec074ef8734341d9e0ff187456422a92237b8fcef3733667710e