Malicious PDF — malware analysis report

Static analysis result for SHA-256 09497e2e38713a3d…

MALICIOUS

PDF

83.6 KB Created: 2021-09-07 04:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2e305f513883a5b7d5fade6643be9f83 SHA-1: 5e370348bb86bf2433513dbe085c8dd4d11279ee SHA-256: 09497e2e38713a3dc236cf4e189285216706e5df1d0245964fb9c5cf24b9d083
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate the document is part of a link farm pointing to compromised or disposable hosting, strongly suggesting a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://specimport.by/files/files/zizafaj.pdf In PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/kimovobalanaf.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93408412.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/kukonanilo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849db44ee74---72277496996.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/fecbda495159d9f03c681f44d80ca1ad/manigogagenejulera.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/mijizibonagemodap.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/gexurozojudikixenitok.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/c02377bde9f587457e73c7d912a3d7b6/zusewojakusidiro.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/92782787635.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/57071305201.pdfIn PDF document text
    • https://hse.tw/upload/file/ralimobedasefitidadi.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/dibelosogofenawe.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa304886ca0---tabamupigijowebu.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d0b67d561---44871021891.pdfIn PDF document text
    • http://rilta.net/userfiles/files/26182798584.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/85819410124.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/58650511523.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077450f0381f---91107627829.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/fdnm1fo4qt0vjdbgiuvb35cg15/97447012548.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/15479680164.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/0ukp54f1jq41j5quha2h7ds3vl/xegedaviralerinoril.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b9ab0e410612ad414fce922861cd2c5a/88411537860.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/93854282135.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/8394240046.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/79792541209.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=laravel+snappy+pdf+fontPDF 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_off0000d4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A5 10536 bytes
SHA-256: 3e35cc6f1f4b3b1cd83a8e97c3c380543bf3be26dde76712edbe42f28328ce8f
font_01_sfnt_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 21736 bytes
SHA-256: 1daed3791c67b401541819b8ce222e5c5ee6539c703aeaace6b62a27b9286b29
font_02_sfnt_off000126a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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