Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c45760694e21f79…

MALICIOUS

PDF

78.0 KB Created: 2021-04-16 16:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 616827e786e9553ba8fdb35393251c4b SHA-1: 3bbebf766d3e7cb868478587a4a2e5b6958cfdc6 SHA-256: 9c45760694e21f79998be9a16da00986fb0c408af07141c0599a84b1c2eb72c2
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on seemingly legitimate domains but are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a Tamil phrase, suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9542

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 https://www.mainephilanthropy.org/sites/default/files/79141676299.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/99469138220.pdf
    • https://ambrose.edu/sites/default/files/webform/28695523124.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/65810703597.pdf
    • https://www.blplegal.com/sites/default/files/webform/piselusani.pdf
    • https://ambrose.edu/sites/default/files/webform/20598750849.pdf
    • https://www.dgs-interparts.be/sites/default/files/jinez.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/lomaxitafuvutatu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=dusk+to+dawn+meaning+in+tamil
    • https://campusrec.princeton.edu/system/files/webform/34970544405.pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/zotatati.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/87767597376.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/lezedatabamivija.pdf
    • https://campusrec.princeton.edu/system/files/webform/popikinof.pdf
    • https://printandmail.princeton.edu/system/files/webform/83401752781.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125af.bin
e7011c8e2a0c7ca6729f78cc5cce2704a522da1ffa3bfbb8f31fb62ed6556dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125AF 5204 bytes

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