Malicious PDF — malware analysis report

Static analysis result for SHA-256 9378420b59940b0e…

MALICIOUS

PDF

79.6 KB Created: 2021-08-12 16:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 938ccfebd0ea7c0b200f4264ef561013 SHA-1: cb3e9115c2d10f10076f861f686abdc6b3c7332a SHA-256: 9378420b59940b0e542ee6cb4fd230376b89f926248ddf00d7bbff9f8e9fa364
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while some are marked benign, are part of a larger pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/qh299fj5vl5erbsvvt4i0ad4qn/rokekevaxexixovilaw.pdf In PDF document text
    • http://feach.ie/images/uploads/file/43061846705.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf01d55fba---vonelukuma.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab748e6f0da---kojekudafisitisinepozupo.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/89641898677.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ff5ab6da13642ab110e56b51be74dfff/45336111557.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/zemabalale.pdfIn PDF document text
    • http://flexicourse.cz/res/file/tezilufulogiradi.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/ef94721119066f14dd602caf510215d0/2738714294.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/45dfafeb274b6398b801579f067ee1a5/jelimapefifazu.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/zixowewijapunikokipavemi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/pmvh2vg6hb2mmasvqjohl02peh/wibimewox.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c976a60ed4---67053295707.pdfIn PDF document text
    • https://e-room.co/userfiles/file/nimidojapogediro.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/33309254604.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b955ec21c31---63034666837.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/91077376029.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/semonodukofulenupuratafet.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021080511282470920.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/73922845533.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/e50cd5cb989a981a3608e522b8007008/86900748941.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/lojafaf.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210616_001644.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=the+harlem+renaissance+and+jazz+webquest+answer+keyPDF 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_off0000d26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 16632 bytes
SHA-256: e775ac59b6495ec8e7263c2267cffe4203be4e300d375fdfb58f5fbbee0ebac8
font_02_sfnt_off000115b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 11344 bytes
SHA-256: 7e6c176e4042693662ac904b5e8424a3ef371dcedef770faa05a1ae07431b965

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