Malicious PDF — malware analysis report

Static analysis result for SHA-256 91dcc7a1cc498276…

MALICIOUS

PDF

83.4 KB Created: 2021-09-09 02:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d98c231c89800679222f11044ed0dc03 SHA-1: 4902dded103c6ad8e0a3997a9d2bf3dccc22abd0 SHA-256: 91dcc7a1cc498276e0a3dbd94e13225d8bb0092e0a8685d7bbf5403698cc0ba4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://pixomot.ru/uplcv?utm_term=watch+jason+bourne+2016+online PDF link annotation
    • https://saksisan.com/upload/ckfinder/files/xanegubojeroninavikabuwav.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/bifexituvaxadikaso.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b33e8edcf---80798839363.pdfIn PDF document text
    • http://zl369.net/userfiles/file/saxivelevumixefafej.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/fetoweg.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/45233541703.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/62525935048.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/34606483523.pdfIn PDF document text
    • http://primaneighbors.com/userimages/64502975534.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/kinapa.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/bokilujipilaf.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613332a17eb06---zabepet.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/8839057759.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/82097503392.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/38484853217.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/80805909959.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/lutilubuxagozewadox.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/62360329849.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/bvmt14ir8iephtt34ll04ikp50/getukadogonulaw.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/64827484403.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/gilaluwopatesamamugipej.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/wosupotegerapew.pdfIn PDF document text
    • http://flairpens.ru/uploads/file/71190540131.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/resutixawuvogozik.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/dasigafo.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/wabunixifudo.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_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 11152 bytes
SHA-256: 6610330e6a3c7049d00f7f165634f203c767b2a4c6eb45943e7a08b2b5311014
font_01_sfnt_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 18556 bytes
SHA-256: 3edb1b011829bb96756ddde718365a3c0523ed17bc44f01dbc50e0432c127937
font_02_sfnt_off000127cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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