Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47a62249e3e55e6…

MALICIOUS

PDF

77.4 KB Created: 2021-09-17 14:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00f8e200d092b638bd3b6d9dde213b29 SHA-1: 7af422f6626f64600c41c2d8225291ec34ed4877 SHA-256: b47a62249e3e55e6637ff5fc538e0d509ea57b9ccc21950163a178136b85323f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=minecraft+pe+1.17+apk+2021
    • http://severstroysnab.ru/userfiles/file/51329232425.pdf
    • http://veterky.ru/ckfinder/userfiles/files/xufezatalunabu.pdf
    • http://grabnerestriche.at/30756806829.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16138c487a6e98---30288726901.pdf
    • http://kaizenlife.com/ckfinder/userfiles/files/94407964433.pdf
    • http://robedecreateur.com/img/files/jimij.pdf
    • https://okazdedziecko.pl/_files/Media/file/nemakibedezi.pdf
    • https://muachungbaohiem.com/uploads/userfiles/file/pukegofapegikeviselara.pdf
    • http://domplus.su/userfiles/files/52162173387.pdf
    • http://leebyunghun.org/new/upload/board/files/20356389225.pdf
    • http://administratieindex.nl/images/uploads/gufaditisokawegefekufulis.pdf
    • http://ttmm.co.jp/ckfinder/userfiles/files/sozuwofifukaw.pdf
    • http://lycee-elm.com/userfiles/file/sijafiganolawamusoruput.pdf
    • http://pokebarslo.com/uploads/files/52182897625.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/71976885394.pdf
    • https://foodsafebox.com/ckfinder/userfiles/files/mokivuxiretopodadatut.pdf
    • http://harekatmemuru.com/images/Media/files/vepujalujoko.pdf
    • https://plasy.com/uploads/file/lekuzezifuwagetewiv.pdf
    • http://www.salac.cz/ckfinder/userfiles/files/sezelewejokupegixefujavaz.pdf
    • https://everestart.com/images/stories/file/17083198101.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd9adc7546---51736251302.pdf
    • http://studiomontironi.eu/userfiles/files/xazewomarekesil.pdf
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/rofifibavabu.pdf
    • https://botroul.be/uploads/74863126531.pdf
    • http://recko.ru/ckfinder/userfiles/files/83019482394.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_off0000c8fe.bin
c3a0d2e5198a10720d0dc131dd42a63a349d9e488c687d4b699ea0a2f97750fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FE 10636 bytes
font_01_sfnt_off0000e1a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 16792 bytes
font_02_sfnt_off0000f9b4.bin
5ebc955456b51dcf9a1c3941336a87ac7f4409f68b9fab789771c289b2080319		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 17268 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.