Malicious PDF — malware analysis report

Static analysis result for SHA-256 6049ee8bc2b12466…

MALICIOUS

PDF

68.8 KB Created: 2021-10-01 13:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4f8e9017dee70ab1e6e9de8fbdf18dcf SHA-1: 2a18e12219878315da8b52c664adcb424960d4b5 SHA-256: 6049ee8bc2b12466756a8d7c003cb1e0520c8102b46120df1477d84663641d07
146 Risk Score

Malware Insights

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

The PDF exhibits characteristics of a phishing lure, including being image-only with a click-outward action and a small file size. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download or redirection to a malicious site via one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pistant.ru/uplcv?utm_term=pokemon+ash+sinnoh+journey+gba+download PDF link annotation
    • http://greenegiving.aboutgiving.net/sites/default/files/editor/file/nuluvemorepi.pdfIn PDF document text
    • http://champagne-ardenne.annuaire-regional.com/ckfinder/userfiles/files/vukefaruj.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/zezatilex.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/jawagizabelazuvudizaguvip.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/3987428805.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109140643506594.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/34544074231.pdfIn PDF document text
    • https://33mobility.net/uploads/files/79111368135.pdfIn PDF document text
    • http://ccshecea.org/upload/files/mezureme.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16154214316668---lotulitilenadatuvemoxeza.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/29507989450.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/kulubeg.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/goxerezi.pdfIn PDF document text
    • https://dukupahit.com/contents/files/funupor.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/bulowapaputukedenubezaw.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/fozufuvodufugefelenutupi.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/pawozuwuwadavasijabanu.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/41065549240.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/95248886537.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/e386a335034437a65633622f04b8f973/19377615823.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/rilenixalodujabada.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/bexudemogi.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/jejusiz.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_off0000afee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC805 11260 bytes
SHA-256: e8b1781cf7a50d55191429b0b46bf99ef4e5059eb021c3a48ded8e6abc1094f0
font_02_sfnt_off0000e1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FF 13504 bytes
SHA-256: 3f0c44ba38fc1b80561fddac72e72c1d0b98b11f9ccedfa068fcfd08e54a1aeb