Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee0d20fd40f55c9…

MALICIOUS

PDF

87.9 KB Created: 2021-09-08 22:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5415fa4b2c0a3af0e91eee61e127bd98 SHA-1: 84cd7d0f6a006b98fe7ad54b97735e93a876c39b SHA-256: bee0d20fd40f55c99072952e20224a5eb841a729869b72e79bf82054db20220d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs pointing to disposable domains, indicative of a link farm designed to host malicious files. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing lure attempting to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=can+you+facetime+on+a+fire+tablet PDF link annotation
    • http://muszempilla.com/files/file/40842864067.pdfIn PDF document text
    • https://iohrp.org/f_files/files/77399427404.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/49600884208.pdfIn PDF document text
    • http://staropolski.net/Upload/file/nexotaj.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/tigiwamazudamemoluxulam.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/8998044979.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3e0e68cea---gikenalobesewu.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/176fd0f08666affed850e09ac504c77b/wotamap.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/83341778442.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/67990685160.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/desax.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/dubunonogevavojopajuvuf.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/wufukagudezujurasinepe.pdfIn PDF document text
    • http://biosite.ru/images/news/file/4911074508.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/92303892229.pdfIn PDF document text
    • http://autokolcsonzoszolnok.hu/admin/fck_upload/file/77068031581.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/lugidove.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/15335882568.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///61140908812.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/gafanapumeles.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/32029963121.pdfIn PDF document text
    • http://gewidor-gmbh.de/uploads/files/15483290576.pdfIn PDF document text
    • http://leguido.net/files/wemagem.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/jemegunux.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/nalizixizoreteziwazo.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_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 18168 bytes
SHA-256: 5e4775f415e08a3c6cb5fd1d9a74fe662d301c431216e8f9fc039794cdf172eb
font_01_sfnt_off000120ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13904 10712 bytes
SHA-256: 83e3db617ca938a36794ba16179b7c5c039d81047cef69397a11350dd863bb5b