Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfac8ac185ed6c79…

MALICIOUS

PDF

167.5 KB Created: 2021-08-16 04:43:59 +03:00 Authoring application: mPDF 7.1.0 First seen: 2023-12-11
MD5: 78bfbf77796c1be086fb8b10b128fc7a SHA-1: c73f5dfc6e95e7c6e15ea16d0c60b9b0af00bf2b SHA-256: dfac8ac185ed6c794fdad0deeb1b6b4439e8655264572c6025631ac591541ac4
80 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0004

Heuristics 5

  • Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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
  • 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://srwt.ru/pdf/carbonite PDF link annotation
    • http://ainhoacantalapiedra.com/boda/userfiles/bravo-ii-autoprinter-manual.xmlIn PDF document text
    • http://www.mitconline.inwww.mitconline.in/uploaded_files/fck/Image/bravo-ii-autoprinter-manual.xmlIn PDF document text
    • http://www.mitconline.inwww.mitconline.in/uploaded_files/fck/Image/bravo-ii-autoprinter-mIn PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (stream_009_off000070a4.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_009_off000070a4.bin)
🗂 Part of campaign: secureserver.net 1471 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off000070a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x70A4 19836 bytes
SHA-256: ad6d801f7554b4de8183daf312cecf2a3a65662328777b95eb4eaac8815799eb
font_01_sfnt_off0000a621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA621 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8
polyglot_child_pdf_off0000000f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xF 171492 bytes
SHA-256: 7378e61ca29ac338f4db153f3901d25a73d72b0655704225986bb5996e12d75f
polyglot_child_pdf_off0000001e.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x1E 171477 bytes
SHA-256: 1e3187d4875522f904025f8bcea83c5d69e9e007581b2f9b6aa1e989f3af5134
polyglot_child_pdf_off0000002d.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x2D 171462 bytes
SHA-256: f615313c5acf012c290b2898bc15931784bf10f95846da8fd91a0852fc811480
polyglot_child_pdf_off0000003c.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x3C 171447 bytes
SHA-256: d357e3b48939f44b6184472bc4927341ba3e7a5c9f1e3aae03f1ea1e8c68271a

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