Malicious PDF — malware analysis report

Static analysis result for SHA-256 9907ec0d789b0990…

MALICIOUS

PDF

85.6 KB Created: 2021-09-19 21:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b166bdb833fba47acd51d71bd0d4cf5b SHA-1: e2ec03d16db1b0a2f2f09f7702b49a31a257a042 SHA-256: 9907ec0d789b09908b8087f6b3372b5b5db77b9ce1c05bd04ff23176980d3bf0
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF document contains embedded JavaScript and a large number of external URIs, many of which point to compromised websites or disposable hosting. The heuristics indicate it's a link farm designed to lure users to external sites, and specifically flags it as an MFA/one-time-code harvesting lure. The embedded JavaScript likely facilitates the redirection or exploits vulnerabilities to achieve the malicious goal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://drafthe.ru/uplcv?utm_term=american+english+file+4+workbook+pdf+free+download PDF link annotation
    • http://railwaysrailroads.com/upload_files/files/wunufu.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/68367966416.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210909_7F8A2AE4E97F8E4E.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/goxifomewojatixidekasi.pdfIn PDF document text
    • http://iviltra.lt/images/files/9679995784.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/vipofubefudutajuk.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/22909278108.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142eed5dab70---8754047070.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/mazerokujev.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16133b649c474b---90680462770.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/jaf4od0lp092kidvcn6deqev7c/58809114355.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/99284450872.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144b5ab0e31b---satawefuvelefuxiwis.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/jenofavozozosalepatix.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/83184059480.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/dijetavid.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/72ed4ad30144624937c479c6eefe0eff/dajipoxelovuwimirajefefug.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/45037320824.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8aa862671d911d62a4d33d986a741d5/21086203306.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/fonuvabuxuretoxi.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/xupasapukobidenidef.pdfIn PDF document text
    • https://network-italia.com/file/kivufuduma.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/nulerisisem.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/45787244026.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_off0000e446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE446 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 11348 bytes
SHA-256: a895da1419e94baac4ea86d793e6eaa7d98a21f9ae604d37910bad7a2dcb771e
font_02_sfnt_off00011681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11681 19144 bytes
SHA-256: 84572418e53e9e23bc7e12a29e0184d09a6cc76748a5db1fea094f3f0fea5b46

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