Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21ecfe0cdb039f8…

MALICIOUS

PDF

64.3 KB Created: 2021-09-13 12:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9f3fee22ebd50a07d77c2151fd89ee4a SHA-1: 60ad8d5cff34965a30f5086bdada2256785347be SHA-256: b21ecfe0cdb039f82da98d199e55e8810c8a201f81ad1e175d36f2bdf71af66e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to various domains, many of which appear to be link farms or disposable hosting, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a non-clustered link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • 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
  • 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://philabc.ru/uplcv?utm_term=mi+9s+price+in+pakistan PDF link annotation
    • http://crmrealty360degree.in/ci/userfiles/files/sezupavikegi.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/seloderanolakefobemafup.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/gamapezagalogodoviwoni.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/neberiketeku.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/18653334231.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/90304471535.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/95490998175.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/34884954215.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/pekikitezomifedokupu.pdfIn PDF document text
    • https://zhansq.cn/upload/file/jabujesaxalegidegub.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/gasurigawedo.pdfIn PDF document text
    • http://traviet36.com/upload/files/18396075456.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/66883455972.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e84be0c774---33248070271.pdfIn PDF document text
    • http://104408017.linker.tw/files/sevarub.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/kobozakizadufipe.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/42270380369.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/galimopulezulodujuvuza.pdfIn PDF document text
    • https://ysh.my/userfiles/file/49958611088.pdfIn PDF document text
    • https://inprovitchile.com/ckfinder/userfiles/files/10022147287.pdfIn PDF document text
    • https://geloracinta.com/contents/files/1360627120.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/pazidu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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