Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86b2246e1554514…

MALICIOUS

PDF

71.0 KB Created: 2021-05-23 05:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df6de37ac2c8162f556a4277cd051b38 SHA-1: 5a73f54d3028b13c997e3c2274d1e54c976734ba SHA-256: b86b2246e1554514aa6ca98c0ccd7f51ce334324e765ed893b1d45e9e74ed4bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and other domains, suggesting it functions as a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to 'Faceit anti cheat win 7', implying a social engineering pretext to drive users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7bb3a68bd---34039710781.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087a08caeec5---86942135929.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609237c2b1648---budutobonerifo.pdf
    • http://billedbutikken.dk/articlefiles/file/zovojutuvibega.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821da07ab95---pinimat.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/xabupekegupa.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/lsma7sfkvkedtrckic8dj1h7k2/jatefadomukub.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/560884c798471c7038e198b5891545e2/lutugazudotujo.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/darasivenez.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c52abe31e---sevuvoweva.pdf
    • https://alshamiltrading.com/alshamilfiles/file/ruzoforelubituxipov.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/4e19731e5643f74ae41c1ed29ad2081e/xekiroj.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/i4figga0ckshqu2hnc0mar1av0/242435261.pdf
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/70526700001.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d367f2d03---87678891357.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=faceit+anti+cheat+win+7
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d567.bin
fbaeaec113da3af0a4921c67161f835ab33cd661d6eda10d0fd3dae12ce83b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD567 3080 bytes
font_01_sfnt_off0000e063.bin
887f03bfa6c9d94d41d04603301ccd36f8a3efc1a9e0e14ec4c478173178f3d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE063 4708 bytes
font_02_sfnt_off0000f084.bin
4ca9fdad72bb13fae78a7eb76a79df79ba71cd9e1e7eeb018019b9d83afc6f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 12012 bytes

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