Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba0dd27e8f435ae…

MALICIOUS

PDF

83.3 KB Created: 2021-09-16 13:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8fca2e7829e17c5e6e59001270e923b2 SHA-1: 7217bd21863e61c24edf512acf0291c115dd1d81 SHA-256: 0ba0dd27e8f435aec3352b592700caca275c82c813c884bd2ae96f456b3dbdd7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links to potentially disposable domains, suggesting a link farm used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://harrisitalia.it/uploads/file/27769572962.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccf8017636---30268286320.pdfIn PDF document text
    • http://harrodsrentacar.com/public_html/userfiles/file/sisevotaf.pdfIn PDF document text
    • http://professionalcatererspaul.pageindia.com/resume/cms_files/files/77200423239.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/67998950260.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/42956417323.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/9928663347.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/a2eb9e470c042725c6b2e68c9f5273a0/lopopisujo.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/zomirofiwowedasol.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/fudatefogabijimulugepil.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/23135857889.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/22722021144.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/pumuxabezezewukifitipimen.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/28705888685.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/vapefodegemogukinaf.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/porowur.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/87887280400.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/sutumu.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/rodalitesusagirisame.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/wirajimibife.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210913_9E116CF3C86DFFE0.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/1584984974.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/29116982030.pdfIn PDF document text
    • https://gencatakan.com/upload/file/75695555028.pdfIn PDF document text
    • https://whitepalacegrill.com/userfiles/92560756448.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/44806688979.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/felawosupepaval.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=all+ludo+star+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_off0000db31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB31 10228 bytes
SHA-256: 96a52e449415275def32e150d2fe0970bb880ef72bcfcb00b3cf2728efb4112a
font_01_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 19944 bytes
SHA-256: ea6b6de24eb9cd0fe1b12454184896c20c2a35affaad28cfade5eb002f64707e
font_02_sfnt_off00012727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12727 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1