Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed6e3d849b82399…

MALICIOUS

PDF

85.9 KB Created: 2021-09-16 18:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 592de38842cbe3f682d3ee3d59b22a8b SHA-1: 12ba4fd39f1df2834ddd7d5a1d421206c020635d SHA-256: 2ed6e3d849b8239913c3b9d8f19581c39ebb4ddb7058c61c11b47fef8516a1d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the PDF is designed to host a large number of links, likely for SEO manipulation or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 5

  • 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.
  • 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://cructi.ru/uplcv?utm_term=best+android+games+using+gamepad PDF link annotation
    • http://pospatrans.cz/UserFiles/File/pumiguluxuxebakapol.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/kugujudiniwetakuvizivef.pdfIn PDF document text
    • http://tianfonmm.com/d/files/tijifirerifidijikugowiz.pdfIn PDF document text
    • https://m3nan973ru5-pa571.com/contents/files/80061216615.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/zarijunamiba.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/7114574676.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/53031969304.pdfIn PDF document text
    • http://secretinvitation.net/images/files/vunujuf.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/kifesiba.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/fixenodatudugotujaxuxa.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/parabirupisamujakagipala.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/dezipexidito.pdfIn PDF document text
    • https://revive.fashion/upload/files/78604930692.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/mekotezopolirojatorome.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/tudururibiwofowovumoma.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/97bee85a1ef38cba6bf5545b4d9db9e6/rusupotubo.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/q1vf7ke9ujj2sdbgi1u2gcp5qa/bemeripavujasapefara.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/20828786619.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/fibododazes.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/xanakuduxegodivumus.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109151646595428.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/81055326048.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/56257109780.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/45224219435.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/60687103122.pdfIn PDF document text
    • http://ping-property.com/user_img/files/62873742817.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_off0000ed34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 10844 bytes
SHA-256: 7d612872913b305793316b71c89f7934905ecda02ec6a3baa2ad1168118b76c6
font_02_sfnt_off00011e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 16988 bytes
SHA-256: dbe5cb535eb7d49852d554ee5cc9df92018272432b59d0c1f5c68f18fae8d75c

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