Malicious PDF — malware analysis report

Static analysis result for SHA-256 0222a9500640cdd2…

MALICIOUS

PDF

49.8 KB Created: 2021-09-30 13:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2451926e0b9004818539f1ea92cd87b6 SHA-1: 31be61dd8e5548e483a7366cdfcc73cbfd09f03d SHA-256: 0222a9500640cdd24964d25ea2c2ba3cf55c00940f551e7be99a0c9de7ccc69e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm and malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures, likely intended to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8817

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://queure.ru/uplcv?utm_term=cooking+fever+mod+apk+free+download PDF link annotation
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/24224638139.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/wupebexujobanafiberikamu.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/loxumimiwazavi.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/66173682051.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/vavepefawat.pdfIn PDF document text
    • https://ancoraeducacion.com/images/59359047035.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/3769262595.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/dufopakufilujul.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/86741159647.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/43912310003.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/gusabudovuvokawiti.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161471734c3020---wupakitozivubatavipup.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/18128672184.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/masixifulodefipazet.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/67349982293.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/tutudawilego.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/wivabu.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/61283300391.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/14604095033.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/xemurujerira.pdfIn PDF document text
    • http://maidichike.com/upload/files/75689300594.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/winudukogesedajagup.pdfIn PDF document text
    • http://hexindechem.com/upload/files/luxirodonisiw.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/83190880486.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/45371340596.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_off0000b049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB049 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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