Malicious PDF — malware analysis report

Static analysis result for SHA-256 7616fdac59470a34…

MALICIOUS

PDF

72.5 KB Created: 2021-04-18 16:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92118f86812188c72add5b9ba6777cdc SHA-1: d39e3d90c3ced3eec0ec1c15c43e8a68e413e721 SHA-256: 7616fdac59470a349a1f40629e21fa24b720e20b99fbf395a0150813f7699444
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a movie poster, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.dgs-interparts.be/sites/default/files/64751185730.pdf
    • https://ambrose.edu/sites/default/files/webform/padubomi.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/vawutudujenopudup.pdf
    • https://www.blplegal.com/sites/default/files/webform/lolavojirubopikumu.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/604022749.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/87706268510.pdf
    • https://natsihwa.org.au/sites/default/files/webform/80931084074.pdf
    • https://www.jwico.com/sites/default/files/webform/kupoxogij.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/95133977644.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+last+song+movie+poster
    • https://drones.princeton.edu/system/files/webform/zifogisabivaloxigisosobu.pdf
    • https://lib.asu.edu/system/files/webform/dilitopuwivane.pdf
    • https://printandmail.princeton.edu/system/files/webform/83605599331.pdf
    • https://gradfutures.princeton.edu/system/files/webform/86626084736.pdf
    • https://lib.asu.edu/system/files/webform/90369837207.pdf
    • https://community.princeton.edu/system/files/webform/setokan.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d195.bin
52623f218a6557b83b4d7dcc3b28c73fe5d8fb285ae6c8a5b7c031ea146bffb2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD195 5028 bytes
font_01_sfnt_off0000e27d.bin
f27733f408118a13cb93e6366d8f5d4c0bbbb5bfd180f77a1a75ded898d191ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 10872 bytes
font_02_sfnt_off00010768.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10768 4324 bytes