Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef6cae20e6b37f2…

MALICIOUS

PDF

72.7 KB Created: 2021-04-27 09:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fe38cb51898aef6e62063fe8aa593b2 SHA-1: 88f92d6d7fc907a5dd908c34eeab5868d19e16f8 SHA-256: 3ef6cae20e6b37f2a2fb08a275cd7ae47145ca6d0d62e3b9909697a0edfac571
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'parts of speech practice test answer key'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7189

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://www.afscme65.org/system/files/webform/96479551545.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/25680057182.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/lerudaxalopavowurugepoviw.pdf
    • https://www.mainephilanthropy.org/sites/default/files/30695142459.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/fudigebifofonixetizitalu.pdf
    • https://natsihwa.org.au/sites/default/files/webform/mufuwujaxerafesa.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/mimixinaxeralowevowijut.pdf
    • http://spotlight-sites.com/sites/default/files/webform/loboje.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/26688185713.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=parts+of+speech+practice+test+answer+key
    • https://drones.princeton.edu/system/files/webform/66931006591.pdf
    • https://drones.princeton.edu/system/files/webform/61493424170.pdf
    • https://printandmail.princeton.edu/system/files/webform/21250884575.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/72323592377.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfb.bin
93ff82f13080cfe493a42165bdc91cc307b460c4886b16b2d52357b925de92b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 5120 bytes
font_01_sfnt_off0000fd6e.bin
2c814c391bfad9ddc9a45649b27670940ed5237d201a13ae126182a267f067ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 10748 bytes

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