Malicious PDF — malware analysis report

Static analysis result for SHA-256 2986ba8b94a428a4…

MALICIOUS

PDF

63.7 KB Created: 2021-04-25 23:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 183f7d8349c49b6cc6845df1b096bbe0 SHA-1: 0d75ad2b0dd81163f867f028cac127824384e4d4 SHA-256: 2986ba8b94a428a407918fd165fead0fdfd4523916d5ecf3d249cfd5958ef6ca
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by a ML classifier and ClamAV, flagging it as a phishing trojan. Heuristics indicate it functions as a link farm on disposable hosting, with numerous embedded URLs. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, not a typical user-created document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8125

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 http://spotlight-sites.com/sites/default/files/webform/44923699615.pdf
    • http://russian-ice-spb.ru/sites/default/files/webform/files/77599308563.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/ratasivovo.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/34869944823.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/27804174203.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/30199048500.pdf
    • https://www.uts.cw/sites/default/files/webform/suvexaxobufakup.pdf
    • http://spotlight-sites.com/sites/default/files/webform/jalipoxelelikepobolid.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/ziwisotug.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/wafawujozovu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=the+shack+menu+overland+park
    • https://drones.princeton.edu/system/files/webform/65601020807.pdf
    • https://lib.asu.edu/system/files/webform/nexeginexepor.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/xumigisapiwonatidokababup.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/moxogugudufagelo.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e842.bin
5380f339d53f32e088f0df0d11ef25e32660b6b9b3e9e084aa560ca8ea9070fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 5384 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.