Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe8c27751c4ecf6…

MALICIOUS

PDF

72.5 KB Created: 2021-09-01 16:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b7376279b5cba177b649b9b2461a1401 SHA-1: dd24e1f118d94cd8e673d8c054540d4d88c4bebf SHA-256: ebe8c27751c4ecf65b8c248f35925d2f9bc43ddf9b9ce89ac1d943ff6cdab785
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate the document is designed to redirect users to malicious external content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crysiq.ru/uplcv?utm_term=kind+meaning+in+bengali PDF link annotation
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/18190178628.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/80174181296.pdfIn PDF document text
    • http://sun-eko.eu/files/file/76533113145.pdfIn PDF document text
    • http://mesahighclassof64.com/clients/874441/File/49559995509.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16124949b4ad38---87436305301.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/pidekozovobamefi.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/56139419885.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/j60pc1j6i8k01mgbij0lmvn1d0/31761305549.pdfIn PDF document text
    • https://tch.lu/files/files/rinitadajega.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc8452cafb---xadejiwumiwajedu.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/ij2m2ekpo4cbkjtp6lknhv9mp0/81450953403.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/lametopuwinubar.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d94a2764319---xazorapebozeduwijukepule.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/bezenakujokaviru.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611a536017595---24942641812.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/7905dfa31cb9850dc2ac36b18a73c010/66663552153.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9b9e13f2a---77805900472.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/e2cd778a048d0f6f9fbad5934617c91a/religarop.pdfIn PDF document text
    • http://debden.org/userfiles/file/55486277356.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b677dd6258---78116977587.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/83324424308.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/xorepupujutijemunazakob.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_off0000b69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69F 10236 bytes
SHA-256: c73fea43b205f8cae19dcd678ba58f716c42654a3f4acf7d1ed538e670fb1e04
font_01_sfnt_off0000cd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE554 17960 bytes
SHA-256: 58a986f78eb84072eb749a7cb87c6c6a15c779999914ad5a4a2015545966c177

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