Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb770924c7dea4b…

MALICIOUS

PDF

3.78 MB Created: 2025-12-10 07:26:41 +00:00 Authoring application: Chromium (via Skia/PDF m141)
MD5: ad48a1273350511296944b812270657e SHA-1: 1c26dead9faeadbff622a6e3fd29a3788cee2fe4 SHA-256: 6fb770924c7dea4b2392f523ba8969abdf17624f10911772eb54e338e71aaea6
64 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that lead to a Windows executable file named 'CertificadoPE.exe'. The heuristic 'PDF_REPEATED_PAYLOAD_LINK_LURE' indicates that these links are designed to deliver a payload. The presence of an executable download URL strongly suggests an attempt to infect the user's system.

Machine Learning

  • Nyx PDF Classifier clean score 0.0001

Heuristics 3

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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 https://secretarias.pe.gov.br/pcivil/consulta_oficio/
    • https://secretarias.pe.gov.br/pcivil/consulta_oficio/CertificadoPE.exe

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off003a7597.bin
9d52f837f14ec96e3f2ff8bcd791f29f20b1c945a05bb73e6f5122911606087a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A7597 52152 bytes
icc_00_off00000157.icc
d9f822e8083f2f4d1c91e887454be5f75e8c7144b2853408f361e3c4a7a6b36d		 pdf-icc-profile PDF ICC profile at offset 0x157 536 bytes
font_01_sfnt_off003ba61e.bin
21ba53ee1122b0700dcbe09031f08292858280d6e7e2be4ac05efa9f762ac48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BA61E 22384 bytes
font_02_sfnt_off003bd8c2.bin
ac6f9dc88b84349172d08a318d515a2b1cc5016ea6636ddc55edee19744cd9e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BD8C2 34516 bytes
font_03_sfnt_off003c25ab.bin
8e3a16ff90451d8abf356299e61b6dd942fca106b0ac5b04415e61f213436676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C25AB 25868 bytes

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