Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f43a36284d70629…

MALICIOUS

PDF

79.9 KB Created: 2021-06-25 15:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12967b03f2be65a7a9355d79a4590c7c SHA-1: 98a943aeaada47a1a58a79a8f9f4a55d3a4d03b1 SHA-256: 7f43a36284d70629662081d039c7ee571dbf76e8101d09d89833889139062af3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://ed-web.cz/userfilesfile/xetefijiw.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607daa8033064---ninibekawilatogubarelero.pdf
    • http://ownlines.com/upfiles/file/kutapamax.pdf
    • http://teckim.it/themes/userfiles//files/9578363799.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de99c87bd9---93365169053.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3821892350---lavegifuzaba.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a533b6551c---dixezogagevolovelavanezak.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c185a8c48c1---rikeb.pdf
    • http://megat.pl/uploaded/fck_files/file/17300958222.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/tagitegewevaku.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea1761c077---kolakituxoti.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/edc988c30ca074aa595c66a5f2d47c16/346564390.pdf
    • http://comlark.ru/userfiles/files/gosulobakaxorabogofirel.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/t4epji62vdknag0tvq6f8r6i40/42659372153.pdf
    • https://susta.vn/userfiles/file/fezodosilifakegex.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5025124ad---39466711670.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+disable+video+restricted+mode
    • 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_off0000d7f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F8 16792 bytes
font_01_sfnt_off0000f00a.bin
d8ed36af0cb4fe5b06bc5216460e02d2f6b9235e132f8ecf2920ab6169fc0587		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 16384 bytes
font_02_sfnt_off00011a5f.bin
72dbea1916e77b47fb4669b55bf8ff4b06c23b4eaf84b4377aa0e3b07a1d5cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5F 10708 bytes

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