Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff761a6879d2759…

MALICIOUS

PDF

131.6 KB First seen: 2026-05-22
MD5: 6a78af70a3a5acf745fafeb0b7a99819 SHA-1: 6dff85afc37011ce86a3a92f15f63fa141185d7b SHA-256: cff761a6879d2759372df8bba78972e397918d2c3bb56ea3dacf39f826f35605
124 Risk Score

Malware Insights

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

The PDF file contains an image-based lure, typical of phishing, with a clickable action that links directly to a malicious MSI installer. The embedded URL points to a file-hosting service, suggesting the document's primary purpose is to facilitate the download of a second-stage payload. The heuristic firings strongly indicate a malicious intent to trick the user into executing a downloaded file.

Machine Learning

  • Nyx PDF Classifier clean score 0.0003

Heuristics 5

  • PDF link points directly to executable/archive payload critical PDF_DIRECT_PAYLOAD_LINK
    PDF contains a clickable HTTP(S) URI whose path ends in an executable, script, shortcut, disk image, or archive extension. Documents can legitimately link to installers, so this is a high-risk delivery indicator rather than a standalone exploit fingerprint.
  • Image/button lure links to file-hosting download high PDF_FILE_HOSTING_DOWNLOAD_LURE
    PDF is an image-only or near-image-only lure with a clickable action to a public file-hosting download endpoint. This is a common malware delivery pattern: the visible page is just a screenshot/button, while the real payload is fetched from the external hosting service.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 1 text block(s), carries a click-outward action, and is only 131 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://transfer.sh/get/GtL2jp/Adobe_Acrobat_DC_sib.msi In extracted file (objstm_0001_00.bin)
    • https://ifrype.com/stats/click.php?key=from_login_iep&url=https://transaction-panel.click/app/In extracted file (objstm_0001_00.bin)
🗂 Part of campaign: ifrype.com 6 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0001_00.bin pdf-objstm-decoded PDF /ObjStm 1 0 obj (inflated) 24392 bytes
SHA-256: f896661e04813fb91e2acdc9ef678cd35d9db7db7245ee009be4ca55028dc28a
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).