Malicious PDF — malware analysis report

Static analysis result for SHA-256 0241ecc48e0cc70f…

MALICIOUS

PDF

85.6 KB Created: 2021-06-29 01:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1787cb3aed1bd750de77026cd697c30a SHA-1: 83cb946fda59531d51eba6f2b688f9c04c374392 SHA-256: 0241ecc48e0cc70f69a3c301fd93dab4851db5c65f7438317c0971741aef5987
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=the+mind+crossword+clue PDF link annotation
    • https://llsindia.in/FCKeditor/file/sivubitigujirod.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/sk0c094e41kncej0i9f2l4t6fh/lisitifevezijasokevopo.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4d5927d6f---xigatozepiwazosisufo.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/83972990018.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609299836bd4c---14580252719.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/92370372760.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/7d4821791117bb4c85024616b3762ffe/66768700887.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/e0k8a4g8bpl10iealopcu2f32p/16139560605.pdfIn PDF document text
    • https://alutat.com/data/file/93861640931.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/32475472017.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/f963a2f62bf220320b4045ceb91c3de5/70097666871.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6baeed0b27---29119339367.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/88ccefa9fb81483b656622d245c429cc/zuwemetilafovawasusivibi.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/suxozetofeladamijib.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/vsl92bmdlo890o13cg9e44bdi0/32813535636.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/29005013397.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/rapuzewixalilim.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/69043280658.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/kefotelivelipomuvodimoku.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b48eb82ceb4---74192459359.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b8c4bc69a---35545430589.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2302e40c69---23100411310.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/32707281404.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/513e0a952385b2ca2443d2c6385e8691/30928148399.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/41c8fbcf24c08d09b0783d4b410f7fac/wugovabitudagilurisutu.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_off0000ed19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED19 17104 bytes
SHA-256: 3a466086e3a08caae9b290e2dbe501072e1a196330ccef055ee5359bb0c1d568
font_01_sfnt_off0001197c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13193 10524 bytes
SHA-256: afd983f5b4aa2532a4e880911284e54d4199c8257c86db276bcb728cb17cdae6

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