Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af4ebebcaf69c71…

MALICIOUS

PDF

48.2 KB Created: 2021-05-01 05:38:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 02591214bcfb2b2cd1cfdea7684b1dc9 SHA-1: 7c3e13074069ce890178392021e25fbed444fca3 SHA-256: 5af4ebebcaf69c719898e6858bc19ed5322ea97e61daa7e81921a0c215dadc16
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users with promises of free game items. The presence of a visual download button and the ML classifier's high confidence score further support the malicious nature of this document. The document's content and embedded links indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9764

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://netcdn.xyz/app/431946152/roblox-free-no-download-unblocked-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-website-by-doing-quizes.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-do-you-get-free-robux-on-roblox-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hacks-to-get-free-goodlys-roblox-murder-mystery-2.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robux-free-von-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-on-xbox-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robux-hacks-were-you-can-download.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robloox-hack-como-tener-robux-gratis-decienbre-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-admin-commands-in-roblox-superhero-tycoon.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-dominos-code-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/tix-hack-roblox-cheat-engine.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004230.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4230 25808 bytes
SHA-256: 4efaf668fdf71a4fe6349d1c75714a6d5079d3ce92593b34bdce25303c9a88ca
font_01_sfnt_off00007d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6D 11440 bytes
SHA-256: 154d59d1680f2d1e38ccb783d6997f344290d121007e51df331726de4128c12e
font_02_sfnt_off0000988d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988D 19036 bytes
SHA-256: e06f7a1caa7793e80c4b963540df26abf9f7784c054a947afa0c6a5e041399ed