Malicious PDF — malware analysis report

Static analysis result for SHA-256 02baab19ff69192b…

MALICIOUS

PDF

76.2 KB Created: 2021-09-18 05:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fb8cd3dfcc5d90751348bdeccb4c9b14 SHA-1: b98931106a90bbe14c2978cbdec97106459a81a2 SHA-256: 02baab19ff69192b7f2c69d9f447fc3df6f41c3eebc45f8b68f241e28fb34822
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://verandapattaya.com/userfiles/files/25265494868.pdf In PDF document text
    • https://mayersoffice.com/userfiles/file/ledesomen.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/punaguzaja.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/werabig.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/korid.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210909213642.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/bigozowokufodejomo.pdfIn PDF document text
    • http://e-menu.hu/editor_up/94948930830.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326ceb38573---matibirar.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/nerusanevo.pdfIn PDF document text
    • http://idroter.org/userfiles/files/45781175304.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/bolinilokedodu.pdfIn PDF document text
    • http://coolbiotech.com/upload/files/karogukamifevo.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/21314303353.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/15138700903.pdfIn PDF document text
    • https://linker.tw/files/79346722001.pdfIn PDF document text
    • http://konberdbio.com/upload/files/55286395370.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/45832194317.pdfIn PDF document text
    • https://greenfins-thailand.org/uploads/file/wuwafalenomelexalajevex.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/givusaja.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/lafajakejulebexukaxedone.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/98402167513.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/lomer.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/lovuxelura.pdfIn PDF document text
    • http://kodemari.info/data/files/95141035758.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/9681729317.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=uncharted+4+mobile+apkPDF 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_off0000c672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE84 17044 bytes
SHA-256: 9f64b686dfe3124a2fe19b65a80f4303731afbf5225ee4d1c90daa4323fe4f20
font_02_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 10928 bytes
SHA-256: eb91b856f546e2461ab700e8ddd703aeb92b3a86d526e9b9c9d9ea27515c3074