Malicious PDF — malware analysis report

Static analysis result for SHA-256 563b5d5f0d893e24…

MALICIOUS

PDF

70.7 KB Created: 2021-06-06 22:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0da1671d55714389dc11f5b779a31ce6 SHA-1: 492943a0810b227d13973c75783eaa21950f1985 SHA-256: 563b5d5f0d893e247fa77f6bdc3fa92d5aa72e329eb2d5c805136c98ef1af4cd
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs, 'https://wastran.ru/pbw?utm_term=how+long+for+putty+to+dry', is flagged as unknown reputation and is likely the primary destination for the malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7004

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/pbw?utm_term=how+long+for+putty+to+dry
    • https://cdn-cms.f-static.net/uploads/4410956/normal_6022bab37fbdb.pdf
    • https://cdn-cms.f-static.net/uploads/4369776/normal_601959c490cdc.pdf
    • https://kazarebowuw.weebly.com/uploads/1/3/5/9/135972211/xozobelaremepo.pdf
    • https://bikafosujikus.weebly.com/uploads/1/3/2/8/132815014/430e0d36eb0.pdf
    • https://static.s123-cdn-static.com/uploads/4478687/normal_6003471bc3931.pdf
    • https://cdn-cms.f-static.net/uploads/4420037/normal_604a1154cd4d3.pdf
    • https://cdn-cms.f-static.net/uploads/4387922/normal_6040d56174f33.pdf
    • https://cdn-cms.f-static.net/uploads/4471488/normal_605d618dcf3ea.pdf
    • https://tokoxiwo.weebly.com/uploads/1/3/4/3/134352544/bigalej.pdf
    • https://sozufozixukuba.weebly.com/uploads/1/3/4/7/134730132/4d928df3e44.pdf
    • https://lasezafokovopar.weebly.com/uploads/1/3/5/2/135294620/fdedab7c7a5.pdf
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/2231582.pdf
    • https://genefitagujutun.weebly.com/uploads/1/3/5/3/135392589/lamawajemesaso-zibudasimida-tusejinasuki.pdf
    • https://sixopumep.weebly.com/uploads/1/3/4/2/134266524/jufifatup-mimiwexe-warupipigamo.pdf
    • https://runewabelew.weebly.com/uploads/1/3/0/8/130813516/jivibi_vaxukunot_lubutoto.pdf
    • https://cdn-cms.f-static.net/uploads/4391317/normal_60174c08cff65.pdf
    • https://lokogupata.weebly.com/uploads/1/3/5/9/135959524/xesipetojuxugi.pdf
    • https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/7638370.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bepisoxu.pbworks.com/f/introduction_to_exercise_physiology.pdf
    • http://mefijunov.pbworks.com/w/file/fetch/144420681/faxudefawawosigi.pdf
    • http://moxulolo.pbworks.com/f/libros_de_aritmtica_preuniversitaria_gratis.pdf
    • http://jetipufagi.pbworks.com/w/file/fetch/144441120/66160683751.pdf
    • http://xivoxibuza.pbworks.com/f/xiaomi_mi_mijia_laser_projector_review.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ce.bin
664163e2c6ed2685a800941a4dd626e7bda8ecfe18e1ba737bfbd1d6d5b1da16
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 4976 bytes