Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df957fcb01cd3a9…

MALICIOUS

PDF

96.6 KB Created: 2022-10-25 00:23:43 +03:00 Authoring application: mPDF 7.1.0 First seen: 2023-12-11
MD5: a661aef0d7e0233a49e000a98db7285e SHA-1: deb2c9823f6c54ced9c630ab778ba298abb4486b SHA-256: 5df957fcb01cd3a9ad703a557911b519686ec96aa1e712da99a695feac2dce50
72 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0014

Heuristics 4

  • 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.
  • 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/mpdf/Dryer PDF link annotation
    • http://strona.piaski-wlkp.pl/userfiles/crosman-0410-targetfinder-rifle-scope-manual.xmlIn PDF document text
    • http://chapraptti.org/userfiles/crosman-0423-laser-sight-manual.xmlIn PDF document text
    • https://www.thebiketube.com/acros-ecs-557s-manual-serviceIn PDF document text
    • https://www.airyachtnboat.com/en/article/ecr-300-manualIn 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_008_off000062a0.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_008_off000062a0.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_008_off000062a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x62A0 19880 bytes
SHA-256: 1333de742ddcbfaca7a569e26cee61a317f00a78edbf54c87ca4b8d69fd04dd6
font_01_sfnt_off0000983d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983D 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8
polyglot_child_pdf_off0000000f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xF 98944 bytes
SHA-256: 9d6a3046c1fb1244bb34e0ecb372bc128dabcd13d8940801e2c37f25ded7baae
polyglot_child_pdf_off0000001e.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x1E 98929 bytes
SHA-256: 65f411f31b2d7e7d01f43519d8efab1f026c5967a5f68f4ca67f6238d4770fbd
polyglot_child_pdf_off0000002d.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x2D 98914 bytes
SHA-256: bb017abfc7c2f18165da94b478faf83cbc797a66f4a1fd9fe135e15066e59a41
polyglot_child_pdf_off0000003c.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x3C 98899 bytes
SHA-256: df4821abe9feac7945e44dedcabbe462b322de2e5f1f82b7e5c94ed8ddbf40eb

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