Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2a6c03dbf48b9b…

MALICIOUS

PDF

77.5 KB Created: 2021-09-09 04:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 74ce1c827d400d9135e15d22024aba87 SHA-1: 02536291462728fce783ac2ba885efac0410247d SHA-256: 6b2a6c03dbf48b9b415249c171c45558d07e82d07288fbafea2e2de4378d92f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics reinforces this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://angarakshaksecurity.com/userfiles/file/vikanitukijisemugumukuleg.pdf In PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/35511894079.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/11026877305.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/50630496221.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/88408046502.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/0a2cf639daa127675dda8738f8dede3c/tevurimadotozekagonubom.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/68210325002.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/keguxuzuwafularofawujode.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/besotefuvuruliwizekelun.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/422995806.pdfIn PDF document text
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/17054189682.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/55909ed241afbc8b4deaa7320440efae/69923321869.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/nigopavamalopusivivax.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/56054766536.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132ecf655de6---89112409157.pdfIn PDF document text
    • http://runo34.ru/attachments/file/45100005378.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/31862580240.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/55178196552.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161391b68c59e2---89286990078.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/valojozexobetivemamefom.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613383a631e54.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/wigabugenoditepimoza.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4783a1359---78283200187.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/galorenulip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=vidmate+download+2018+install+downloadPDF 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_off0000c8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 10868 bytes
SHA-256: f8a94c91f238db70834fdfa41b906f13097eaca6522248e368dfa41cab0fb0d4
font_02_sfnt_off0000f9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FC 17824 bytes
SHA-256: 6e34b4cf7986d90bd107f3eb70bde166c45e965d31d2d00d63f41ce51a8d68dc

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