Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e63dd93c35836f…

MALICIOUS

PDF

82.2 KB Created: 2021-07-26 01:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c57c3b4bd45da404dc52b9edf60784d SHA-1: 33214d693752736f3df56af7a7c6178e88ef4ef1 SHA-256: 08e63dd93c35836feb6b954113c0efb7051dba97f9af54bd77c85fb1d31e6f9d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS uploads and disposable hosting, forming a link farm likely designed to redirect users to malicious sites. The presence of a 'download button' lure further supports a phishing or malware distribution scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://beautydiction.com/ckfinder/userfiles/files/bimezerotiwiluvebe.pdf
    • https://sportuna.be/ckfinder/userfiles/files/57911173779.pdf
    • http://apsons.eu/files/file/69181776204.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/8b26620ro08suuvq4ghggttva5/munudusafi.pdf
    • https://tecnicadovolante.com/images/file/28304373551.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160e929fa9c6f8---26325455496.pdf
    • https://baoholaodong24.com/userfiles/file/tivofuregeritukuxikokafel.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/42617776337.pdf
    • https://syteq-pro.com/userfiles/file/nefisired.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/iv7tj30a7n24cc5lke5fucdj4p/40227803407.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/20691f424890f78573a4194d3cf8a601/didivusu.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae561613bb0---medalukagofofizi.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/03t0enleeq1lv53d0mhnfa4lc7/63816249553.pdf
    • https://susta.vn/userfiles/file/50887153306.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160766eff6d2f3---70451664379.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/21f2155aae5ddd909ec433a0009f55ba/66760828985.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/7e6dc18c4d565d22ea34b79e8f25ae48/52151838094.pdf
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zatutuluborowikofuraxal.pdf
    • http://aire-limpio.com/img/editor/file/62448729869.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8219535f7---69110074784.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/88490740287.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/768b68652f9325261cd5c2ab43e3c7d3/27547138222.pdf
    • http://vitanova-cattery.com/upload/file/dusotanaxetusaku.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b779d3c1d71---zukudavemeduser.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=possessive+pronouns+worksheet+year+5
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dad7.bin
89246b98999037b9587bf3aae0fb07d62b3ca495f12a50ad845192c49490b4b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 10896 bytes
font_01_sfnt_off0000f434.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF434 16792 bytes
font_02_sfnt_off00010c46.bin
9f2382c7db65f0d017ca033c216522b60cb8be1988f8e60aa8489e2a33df2195
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C46 17728 bytes