Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3967285b76d442…

MALICIOUS

PDF

79.0 KB Created: 2021-09-09 14:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eab136cfc3d57686c858e1bd86d05232 SHA-1: 6ed307a886de8850f8b79d632c7d0eec8e705b5d SHA-256: 1e3967285b76d442841c561d3b03650d5fa7c2a11667024e4582883280eef6f1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The presence of these links suggests an attempt to redirect users to potentially malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL distribution point towards a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://plymouth-logs.co.uk/ckfinder/userfiles/files/zetejatukorefiguvugolina.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16132bed082e09---50846485871.pdf
    • http://wamer.org/userfiles/file/mujupofijovafinazoraf.pdf
    • http://uticachemical.com/files/upload/files/sasuwigelaj.pdf
    • http://brmxn.com/userfiles/file/20210908230023_9g6m24.pdf
    • https://spvi.cn/filespath/files/20210909052620.pdf
    • http://ciskmv.com/css/file/ponugoxasisumemutivepanow.pdf
    • https://eletroluz-al.com/_IMG/img_internas/file/paxejirepafe.pdf
    • http://htygroup.com/upload/files/35459037162.pdf
    • https://ashleymongolia.mn/uploads/files/24870152631.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fe3257202.pdf
    • http://kimwendelldesign.com/ckfinder/userfiles/files/43164010619.pdf
    • http://minhanh.com/files/tananizipapugivupen.pdf
    • http://www.egavilanes.com/ckfinder/userfiles/files/pokarigiju.pdf
    • http://agro-norwa.pl/userfiles/file/31239422473.pdf
    • http://www.likoda.com.tw/upload/ckimg/files/67067403332.pdf
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/lajedupi.pdf
    • http://eegbiofeedback-leszno.pl/userfiles/file/sopuditari.pdf
    • https://tecnomatec.cl/upload/file/7968534979.pdf
    • http://macabrey-luthier.fr/data/Files/bunenela.pdf
    • http://reklamavysocina.cz/UserFiles/File/bokisasosixekurixesuv.pdf
    • http://kqcme.yiaiwang.com.cn/upload/files/sokixixiwibemoxe.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/33039136619.pdf
    • https://gameclub.by/uploads/files/jupoxolerazad.pdf
    • https://vettercycles.ch/userfiles/files/51450722162.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=esim+in+galaxy+watch
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e639.bin
005f8f40d167f9be2ffa983b742f2c399f0ba485ef4cb0e89c4ebff1f8309e7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE639 19532 bytes
font_01_sfnt_off00011855.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11855 16792 bytes