Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd9079fe491f664…

MALICIOUS

PDF

69.9 KB Created: 2021-09-25 13:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2df718d9a9c768fe2932c8271ce3bb54 SHA-1: 78d9328c27b4023c3ebc2dfff620f41c9b096a7f SHA-256: afd9079fe491f6646809588a2e848feaea870d9201961384c4cfb536cd0864ac
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://garglob.ru/uplcv?utm_term=lego+movie+game+android
    • https://pointwebhost.com/calisma2/files/uploads/vebokivumugitozova.pdf
    • http://bbdecontra.com/userfiles/files/38007881863.pdf
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/37733126974.pdf
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/70931098680.pdf
    • https://www.karelo.com/uploads/File/xuxefixi.pdf
    • http://abbwingslynnhaven.com/uploads/files/paropofivafuduvexamubew.pdf
    • https://panificioilcavaliere.it/userfiles/files/mekojukekaxid.pdf
    • https://weborder.cloud/userfiles/file///bufuvod.pdf
    • http://hnkingdee.cn/Files/file/202192422226.pdf
    • http://chnli.tw/CKEdit/upload/files/wowaripabasatokibufu.pdf
    • https://tlkingatlan.hu/kepek/other/file/69802594697.pdf
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/53807152400.pdf
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/24897483945.pdf
    • https://marlschuz.com/userfiles/files/mimowo.pdf
    • https://dusunceokulu.net/resimler/files/23219093980.pdf
    • http://farmaciafoglia.eu/userfiles/files/62307705204.pdf
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/89282006327.pdf
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/89320053408.pdf
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42716236968.pdf
    • https://onutglen.com/caningest/images/file/dazerivozogo.pdf
    • http://gesundheit-im-blog.de/userfiles/file/kaxuta.pdf
    • https://vsetinrally.cz/userfiles/file/30489815046.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_off0000b0e6.bin
a037f9ae9202a8f30bf183ee02ee217870ba7b82b84a54cd2083660b1eaa1bcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E6 10300 bytes
font_01_sfnt_off0000c7ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CE 16792 bytes
font_02_sfnt_off0000dfe0.bin
f72cf8fcb78235cce74a892aceb21c826e50b388009133cdadd5e626092a152d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 16644 bytes

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