Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9ed32444153f1a…

MALICIOUS

PDF

72.6 KB Created: 2021-09-01 14:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 822aa942598bd2fd846bdfb0476ee858 SHA-1: b7dfdedc35204fee274358a947193cfac3c49a96 SHA-256: ba9ed32444153f1a43c0b6f8f0f0e886eae8318b60f6223dd40616ffe0fb58b2
156 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://alwaysfavorentertainment.com/clients/879371/File/87768482359.pdf
    • http://ajivikafinance.com/userfiles/file/81866191672.pdf
    • https://honghow.com/ckfinder/userfiles/files/92284061229.pdf
    • https://conexusinternational.com/ckfinder/userfiles/file/fejuropupowufulaloba.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1f111af13---59860761671.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d2cd3936ac3---nenevakalumamiwijufupir.pdf
    • http://akkoryazilim.com/userfiles/file/47435181237.pdf
    • http://xinyuemu.net/assets/202106/files/20210628024238164993.pdf
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57815797148.pdf
    • http://rotarycochinharbour.org/ci/userfiles/files/89756535873.pdf
    • http://liebherr-tr.com/userfiles/file/99342529842.pdf
    • http://transfertrolley.cn/d/files/64356925209.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/i91tc2u0sfghg1504eptk7nq7b/sevuwumuxowudoxakileriti.pdf
    • http://egyptlance.com/userfiles/file/vitifegakexogovo.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/c1e4ddfc3da1174313fe671b39ac8f6d/lewituvupavozuje.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/7j10104nl18vt23945fl691kda/87846974021.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/23230ddbdd7619f34e867e021e6dc6c6/nulomirame.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085d88c958e2---74384736767.pdf
    • https://kompaspt1.com/contents//files/83299155231.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a036c6bd7e2---nivavataxabokufafisiwewu.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/628f3ts2qo0175cbv8nrfrpab2/wopagedewoxikijetemi.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16080929ed03a2---toriwedugowevija.pdf
    • http://refinerlink.com/userfiles/file/vusofegajevuzolemogoru.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946684bff40---kotasepegunivaretekinito.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072224f64b89---98130514014.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1606cecea0174d---vigezinomejomirimafe.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608db02ba8ab9---64696790108.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=sudoku+puzzle+and+answers
    • 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_off0000bdcc.bin
6236c3bdd8be41951d2e5da030015959659dafa42bbe6994681b1e48b02bd90d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCC 10608 bytes
font_01_sfnt_off0000d644.bin
1d3905cbafcc65b695855d706be83ef268717f0063fcec9810f0d82d2c8d27c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 14820 bytes
font_02_sfnt_off0000fb9b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 16792 bytes