Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0649e5f304fa02e…

MALICIOUS

PDF

88.3 KB Created: 2021-09-20 12:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 829012c40219845f0522193b51027f26 SHA-1: 4d5e4f2327089ba562e2e644781f48fb3ad2236b SHA-256: f0649e5f304fa02e32e775412b6aa5733fd143e59dcc178b63a2091132d65ac1
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. The embedded JavaScript stream and the presence of a link farm pointing to multiple distinct hosts, some of which appear to be compromised CMS uploads, suggest the document is designed to lure users to external sites. These external sites likely host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://cructi.ru/uplcv?utm_term=abdominal+cavity+parts PDF link annotation
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28334913449.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/29416749156.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/4ca3dddefe97dc47e99502db8396c7f1/pekomagom.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/rarowero.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/fevujaporofuta.pdfIn PDF document text
    • http://emannsltd.com/userfiles/zitirexab.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/64032504651.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/48bed3ea7359650202379e04445dd092/30189805384.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kiwoxebisoledirobaropetaf.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/tegefiz.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/91251153077.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/xodunasoniri.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/16351360081.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed7d3ae2a4---22934213913.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/mowapuv.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/dunurejopudu.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/farutozofamumoninumunorid.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/82090703040.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/60490029237.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/88203323860.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/48398741860.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/18782172093.pdfIn PDF document text
    • https://matraci.info/UserFiles/File/zoxalafowaditeg.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_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE7 18280 bytes
SHA-256: 8fcafc18798dc057ee2a19e9e6270c900856c94b06ff970c9e74319432fa52a6
font_02_sfnt_off00013b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B25 10844 bytes
SHA-256: fb42d830662bc438923c7dc2c2fd65fcec49d9c3fa9667f20f34ffdf754b7b03

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