Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0677f396b85fc85…

MALICIOUS

PDF

82.3 KB Created: 2021-10-07 03:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c1ab4a6517fd5a5f8d7c63d4328978ac SHA-1: 1ef6d747b17f1a51db9aaca20c892cf77fa99269 SHA-256: c0677f396b85fc85c8ab883151d56f8bda5125645d4b3c60d436281fd12eb659
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to external URLs, as evidenced by the numerous PDF_URI and EMBEDDED_URL heuristics, which are often used in phishing or malware delivery schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/3f02cc9c21cd23a5d0066fff2527a9d4/muxetawakopasebabaf.pdf In PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fidewixuzarudaziba.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/wurusepevogufa.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/womivapoduraroruwu.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/mitupowas.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/xobalotegujijenuju.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/votadowa.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/95857673073.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///62627649123.pdfIn PDF document text
    • https://nurea.se/currency/userfiles/file/85722557578.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/nogolujitidojewawuf.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/vodavotovexubigoge.pdfIn PDF document text
    • https://signika.pl/Upload/file/82961622656.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/tadosefixogusipifi.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/zevaloxututezigin.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8558b4724---giwew.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/67230122355.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/mijiwevanovetuxadapob.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/12024162508.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/subozizomafow.pdfIn PDF document text
    • http://oiacreation.be/userfiles/file/wererivuviroxifew.pdfIn PDF document text
    • https://jensbrode.de/files/file/97403206453.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/9cea0588efea76ab96636b98ed6bea4d.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///72036144347.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/10967212208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=from+where+snakes+lay+eggsPDF 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_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF162 19364 bytes
SHA-256: f9b8745dda9f58ff3ff8370f18ffc6e7d264018abf3f2943b6879cf7ed09cf42
font_02_sfnt_off00012337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12337 10636 bytes
SHA-256: 6957d17942386a3be512ac02649962bfd6ee6f735f7352600bb88b1e7e1d2351