Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee51028bbbb8f99…

MALICIOUS

PDF

98.2 KB Created: 2021-04-11 02:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cadb5eada1da794d77b2f7d36ca3db4d SHA-1: f3e93932f64e627d24fcd5ba614b2b47da03333a SHA-256: bee51028bbbb8f99e10c2d8dd0b29bacae046f188a48fbd660e4c6627e9ff3ea
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body contains a lure related to 'Empire four kingdoms free rubies' and an embedded URI pointing to a similar topic. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the lure suggest a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.enwidth.com/sites/default/files/webform/resumes/22435641867.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/17423244846.pdf
    • http://www.friendlycc.com/sites/default/files/webform/47778491084.pdf
    • https://www.telluridescience.org/sites/default/files/tstc-applications/kuvusuwube.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/27999686052.pdf
    • https://ambrose.edu/sites/default/files/webform/natogaj.pdf
    • https://ambrose.edu/sites/default/files/webform/99544266771.pdf
    • https://natsihwa.org.au/sites/default/files/webform/filon.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/ziseriwutekezarog.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/92207600326.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/90703453713.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=empire+four+kingdoms+free+rubies
    • https://campusrec.princeton.edu/system/files/webform/xapedejezorim.pdf
    • https://campusrec.princeton.edu/system/files/webform/wawojamifot.pdf
    • https://www.vub.be/sites/vub/files/webform/gegisikirusesikogibo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141c8.bin
01d00079a02e211414a9a6d881029895f78d7ff5f04632ae4e17fa743af7e144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141C8 5280 bytes
font_01_sfnt_off000153b0.bin
8fc7fd273f29e072b1f9d4cab437b0b07dfcbdcefe748e4c62208c675c7f633b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153B0 13564 bytes

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