Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ec6d5268519c34…

MALICIOUS

PDF

87.4 KB Created: 2021-07-05 12:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 19f08a7223afa06e8914667f62cac477 SHA-1: c4a37f86a5dc7e93ad292592a152d4e584bc33ed SHA-256: 09ec6d5268519c349eb26b20d1ca8edd8cc9cf24d97a81acfada26934d0194e9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many hosted on compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=can+you+close+on+a+house+on+the+weekend
    • http://roland-toys.eu/userfiles/file/jedita.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/1faa2fa383709480145e2cb4f02e90f3/51662803766.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5c7f0a756---51076989032.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/6672924d5b716ae435c73cfe00d29ee4/dowoki.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/adcc818f9e40ba1c4148c16d716cf726/tokonuteza.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/552735880acbeb71b151a7fd065bda1e/zubonewomin.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3bc55572f---27642759081.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608515973c36e---vogogawezeso.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/c54d65a44eac8a8fd86baf817b2ce898/valofazimejajebixazapaja.pdf
    • https://t2sc.me/userfiles/jazoguzijuve.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/cglilrv6c0gfhae234qvvopjr1/30773978461.pdf
    • http://school19-zav.ru/userfiles/file/bubuzisiku.pdf
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/55231641925.pdf
    • https://empezo.xyz/js/ckfinder/userfiles/files/fokifiw.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a757a7649dd---zarakagebi.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2371d80906---vufutowanilu.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/36c52ac5465503cedf847db343f8feb3/norevepawejewasisa.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/caan68ollc7lmn0n6o4pnf4t3v/58406411719.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39ca125cfe---sukaro.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/62ba5d2c78d15fd9c16fdf9f17dc7abd/91173657356.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/15bb50df6214f4e70efc04ac4cfec427/gulawubikofu.pdf
    • http://alibabashipping.com/userfiles/file/texagowuduvado.pdf
    • https://radmangroup-ye.com/rgfiles/file/74374762477.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-4-29/20210429002500227208.pdf
    • 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_off0000f438.bin
22870d6a76282721b3d3f79b52b61aee6fb06f6a69310e8b5c446f6687f0c596
pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 10696 bytes
font_01_sfnt_off00010cdf.bin
06909e82d03111e8a4697bd37a2ded7a5e73548bf52f1e0f642ceed7161f7f11
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 16648 bytes
font_02_sfnt_off00013818.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13818 16792 bytes