Malicious PDF — malware analysis report

Static analysis result for SHA-256 d943b208a6afb8e1…

MALICIOUS

PDF

96.0 KB Created: 2021-09-12 07:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d57113fd59ac656e614d1607c9002f66 SHA-1: e910549c9b4bcc44e6ff7bc96f43733975cf2b93 SHA-256: d943b208a6afb8e171d1c592f9f761122d9c326f5b1729218e5e8be419d9de83
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The 'SE_CLOUD_DOC_LURE' heuristic indicates the document impersonates a cloud file-sharing service, a common tactic for phishing or malware delivery. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest an attempt to redirect the user to malicious content, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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 http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vowobilojilomivorokob.pdf In PDF document text
    • https://plasy.com/uploads/file/kodoreravogugazeb.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/naxeruso.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/a5d5ccdbe42693e0f8d7118809a1b505/25879674525.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/86890056412.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/metesomozivopanozolodoto.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/1901950996.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/sigasanubimewejatex.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/mulixawub.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/45359813741.pdfIn PDF document text
    • http://santabruna.cl/upload/file/gepilenat.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/zepikugo.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/nevezolevup.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/dunubuvijedav.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/91268911577.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/05/38980032308.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132827bba99e---45855202564.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/sofumotexum.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/b0f3ccadb2540b6fbc07fafe78911b85/67638026445.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/zojubawe.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/86711784781.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/85683000348.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/83724454043.pdfIn PDF document text
    • https://intersensor.ro/v2011/Files/fck_upload/file/65529248970.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/44890554175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=aplikasi+wajib+android+kitkatPDF 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_off00011316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11316 17840 bytes
SHA-256: e40c6256ee95d098958cddb37c83a4e4a9c10617429d83577766500ed1bb1faf
font_01_sfnt_off000141c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000159dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159DD 10680 bytes
SHA-256: 6b1aba9784058aa5567cc5269d7aac1b6ea31e8b0112a7a90c9c54fefec0b046

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