Malicious PDF — malware analysis report

Static analysis result for SHA-256 f269705de14cfadf…

MALICIOUS

PDF

103.5 KB Created: 2021-07-23 08:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9d45846fbc9d68327a363d6f80c9d8c6 SHA-1: b08e7cdb1d261db4ae854f6d16558ed12550b7c8 SHA-256: f269705de14cfadfaf0c43e334e7bf9f1aebd28db67ea41712fe5d66cdb356eb
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or link-farming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://glory-aqua.com/userfiles/file/vigotexilajonobubosu.pdf In PDF document text
    • http://nrnchina.com/test/images/ckfinder/files/funopifojepopidiwobix.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/a1c8ab5d0e969ba0df486acf169ffe70/98328259325.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/449621f17fa1921a53bd851f84ed926c/50003587136.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/bufimodixaja.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///20749889845.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/1ldvng0vchomfgoos1ktkeo0s5/68288303725.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082403417d78---perawidikojodov.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/eed0bf0adf6c3ce2014f3a3510d0f46b/kaxuwuratowaledanur.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b70b5e84c---72169970932.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/tupazusetuzunegofeg.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea29867176---14455314994.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/9375200116.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/muvizulaxadexapetik.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5433c11f81c84bd97247e486b371fade/43979111283.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bd21bd723---30278250269.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/9pnt790j1acofd0tsf22g3cvjj/83980986216.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c01cda01a---zavemisofuposun.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64380569195.pdfIn PDF document text
    • http://classofjoy.com/KK/userfiles/files/21284986470.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa28fa1681---39188348808.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e79e2761e4---45859529652.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4levs5e8nk1iglikahaum5m93m/67959323509.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eefc5b8191---zexotumefofilezodir.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/06a274da179fca0f4a39e9417788fac2/68730137897.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=notes+on+reproduction+in+flowering+plants+class+12PDF link annotation
    • 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_off00012df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF1 11128 bytes
SHA-256: 309a76127ebbe7db4ce202c78bae7f031b32e8930512fd0e38a5e15b675c169e
font_01_sfnt_off000147fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FE 18368 bytes
SHA-256: 4b8a9c97f08d8c71f21a7ab044d6d5217aec20e458ee922975ce91af00fad919
font_02_sfnt_off000177cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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