Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf026775080f02f…

MALICIOUS

PDF

71.7 KB Created: 2021-05-24 21:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 006125816c96c4356d423201e3dc66d2 SHA-1: a9346903b0d9ee0470465eac9e9a6918bf4c3042 SHA-256: 7bf026775080f02f398c079efb45672352d72a527363f8cf4013134a867ba090
144 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to 'download nexus fl studio gratis', suggesting a lure to download software. The 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077429fa35cd---25091233443.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/2bb6deb71de33c4190227eed9d166243/30178636035.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f87d295495---82954528779.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/f6cb9d422dccf7f36c992f58d67b541f/pavedovasuzimokipizokek.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4b56a6d3b---29584544646.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/mdf4jqqlrcgv9kemo0bt8js33n/jidamora.pdf
    • http://prosquash.by/data/xaperisosiwurupawe.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f37d0b20a2---faxalewumusaguladupuged.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/r46cperj6odtvp4l0so7lrm68i/10917580079.pdf
    • http://atenngo.com/admin/sites/site/documents/32014010366.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844e17be790---90413981183.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/d03a54a560c03b19674218509b25e633/tepazon.pdf
    • https://airflow-skateboards.com/upload/file/nowunofoma.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609b718fe4e3b---7732148628.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/o5n537j9ktr15dmvkhoui0n427/rigoruveburul.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/59f2963baacba3ced60dd350940d2f63/fajavisulopotaxasijite.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=download+nexus+fl+studio+gratis
    • 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_off0000da5d.bin
4304401f60737e104cd942d9a95c2bba08b12d32862229179f0116f1e2659a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5D 5232 bytes
font_01_sfnt_off0000ec58.bin
df505cc53042d885750b4362f4406822eaa3c2a35d9e8e16a1aeb613ba374cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC58 10932 bytes

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