Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69dcf540010b08b…

MALICIOUS

PDF

80.1 KB Created: 2021-09-04 04:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f3a1c3f6a4c60cfca2642ab315f003c7 SHA-1: a5646acb5c17fdcf5cb2c68b1f54b531e477406b SHA-256: e69dcf540010b08b7b952edc3760fa4e5834fb9113ff892f40350044cc38e70a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The document also features a link farm pointing to compromised WordPress sites, suggesting an attempt to host or distribute malicious files. The presence of these elements indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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://wastran.ru/uplcv?utm_term=strategic+leadership+and+business+ethics+pdf PDF link annotation
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f23cc2a7387---87073649265.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/40853397782.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/sevigesakalevunumaxarasor.pdfIn PDF document text
    • https://phm.vn/upload/files/gorogogipolidowu.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/pagogot.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/96532874055.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/e937616936b17fa5fbf3c4ad264bfa57/sevafezotofuxawofanezi.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/3731b05cadce60f5d1c89f30855c8d15/tibiniwutiwafebo.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/is436ehsr59sv3pdk0b99ojet6/67093119787.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/016ac2a1e0866d4fe9718abdd0f5b5c7/18952621481.pdfIn PDF document text
    • http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/45974143676.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/videronejokevufelasike.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/86638768541.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb67a8e00fa---55387109376.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/85267774544.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611fe4484799d---nutazejovisa.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/12669252107.pdfIn PDF document text
    • http://prmakeup.com/Image/files/wotonolaku.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785fd7e323a---rafuwi.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0ff2769e4---27753500496.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c716c334667---fikugiwasurusefe.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/benanages.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/tefuzanegevowewadorem.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/78255705689.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 16204 bytes
SHA-256: 8e4f5a7c68ad5c0328c93cd9cab9b5683f4aca1168590adf7fc8e70e2dcf2dea
font_01_sfnt_off000100d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EE 11092 bytes
SHA-256: 0b747aa49049d0260c7735c6ff9033d7c5726579c007f459906313ddecc60798

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