Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0593dc526f2937…

MALICIOUS

PDF

85.2 KB Created: 2021-08-24 12:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cf10cfb0013605a86c1c9f6d351719b5 SHA-1: bf80922f37620da7538f620b3b19cbbf56b780b2 SHA-256: da0593dc526f2937befe9c4323903dfb629665945a9bb747c9b28bd5e81d7cfc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The structure indicates a link farm designed to obscure the ultimate destination, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • 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.
  • 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://nousgarage.com/userfiles/file/86051520320.pdf In PDF document text
    • http://alnoorcity.com/userfiles/file/bumokirijuvefonojanife.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/57510568320.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/72061662806.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/29663089548.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/70177072075.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/45f7fbd1e0a9a799121ebb6a69ccf1aa/66592909836.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/21411266291.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/l5klcc1f0hajtrbpta00an63i6/dasadilumawomibi.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/57758543660.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/cc622b51721706031a9c75bdd9e32ab2/xuroj.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/dapuzimenovu.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/64116870859.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084348899d64---tuvegovanisemulefilim.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa833747d2---43574371189.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/7412271749.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/f1af0057181873be85d2a640cad62892/kowifinusixap.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/f1ej55ufkvrimfhurpghfjvbgd/rubizapabefilajew.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/73831307527.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-7///2021725029522910.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/filoburirizenudodifoj.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kabesimuramezujeduz.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9677f1960---sevexekajaluzoba.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/26776771135.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/rofesi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=fast+and+furyPDF 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_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 18196 bytes
SHA-256: df928b9ee4b2e0667445594bb0a280248adb41ac8675083b8d99b345cefb1767
font_02_sfnt_off00012f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F13 10148 bytes
SHA-256: 2e90fa50f2db6e2dabf805b62046bf78b247cd60174354db87f5ed50591e6621

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