Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a401862aafbd85a…

MALICIOUS

PDF

99.1 KB Created: 2021-04-06 19:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 035e1b9aba9cd70e56a7aa8d1bab8541 SHA-1: df320ea00f1d02d61551456f45020212ce2b1c7a SHA-256: 1a401862aafbd85a38073bdd21ebfd7479ee334aa88d9ad02f40be69578459fd
96 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs, one of which points to a suspicious PDF file. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a 'Bohemian rhapsody partitura violin pdf', suggesting a phishing or social engineering attempt to trick users into downloading further malicious content.

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 http://spotlight-sites.com/sites/default/files/webform/sugugijokasu.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/86929885116.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/tonitunivopevefasoxezaw.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/ziseriwutekezarog.pdf
    • https://ambrose.edu/sites/default/files/webform/28961662769.pdf
    • https://www.visitsavannah.com/sites/default/files/webform/90994069376.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/39809543560.pdf
    • https://web.liderpapel.com/sites/default/files/webform/kivalin.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/sumeli.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/42283273604.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/vinoku.pdf
    • https://www.mainephilanthropy.org/sites/default/files/49101071505.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/95133977644.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=bohemian+rhapsody+partitura+violin+pdf
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/46273532178.pdf
    • https://community.princeton.edu/system/files/webform/luzixuganigofifabeja.pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/86402477901.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e58.bin
60f1b0d2915b9be598f3613945861c0ae47d5ef767fd34bae762db1b5633fd21
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E58 5492 bytes
font_01_sfnt_off000150e9.bin
77c948d50f9335cd93258e0f421aedbdbf0d13a63f71ad0f68fa7bf054e5798b
pdf-font-stream PDF embedded font (sfnt) at offset 0x150E9 14204 bytes