Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbadaec75292f69…

MALICIOUS

PDF

90.0 KB Created: 2021-07-19 02:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: efc3351580b335767b9642b8c6425c36 SHA-1: 72ff41d74db4b2c6b81e826ef5bf43da297ee249 SHA-256: 9dbadaec75292f698378df99d9f016e150f07b4d107b681a05c428615738ff07
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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 http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080353bac02c---12191638542.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/0a0b9eea32be8d9bc120648173c6e5b3/tebadusinusikasigijum.pdf
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82737694757.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c12fd924efd---34163853272.pdf
    • http://shipagents.nl/uploadfiles/file/vuximor.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6dc266079---77534234471.pdf
    • https://skvacations.com/userfiles/file/97551162566.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/ee637e0f416b93d4098ea537a3246864/6018929687.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/2457d21c0d8bd1c00b0660eacae2cbd1/xajebuto.pdf
    • http://nakatka.com/files/file/2235214559.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d0927db26bb---68276943068.pdf
    • http://thegioidahoacuong.com/uploads/image/files/56629913398.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c4d125027---suluvovunutotunevadaniwex.pdf
    • http://rollfactorytogo.com/uploads/files/59317257485.pdf
    • http://banghetretunhien.com/media/ftp/file/28656559655.pdf
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/toputadavexubiza.pdf
    • http://www.siphonicflowmandiri.com/upload/files/52084463639.pdf
    • http://serextion2006.com/js/upload/files/wunirarofejire.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a149b1bdc7c---topazofuxakatiwaginiwupi.pdf
    • https://viettrungson.com/media//Files/43491655676.pdf
    • http://piotrkowska77.pl/zdjeciafile/xelidojisafaraviba.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607abda12760f---gemekepokufanilanerel.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e87a203f3e1a205601879ab1b4ce2d4/89221538086.pdf
    • http://pdww.ru/ckfinder/userfiles/files/xekolajifupalanejuka.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=post+nasal+drip+and+trouble+swallowing
    • 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_off0000fe0e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 16792 bytes
font_01_sfnt_off00011625.bin
472177d513e064c325688db5d4ff6db08ffa02135715fa8cabc08f46b609fb2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 10896 bytes
font_02_sfnt_off00012f17.bin
240cff6af58fe936f14ba5ed7e8b0b0063112b2e67ae927c90ee12130204b8a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F17 16840 bytes