Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4bf79af5c87af3…

MALICIOUS

PDF

48.3 KB Created: 2021-06-08 21:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 695ee3a2b328212b4ae68835fa25ec1d SHA-1: 87dacdd1f4d745d61b2a4f0ddebc149da4462e24 SHA-256: 7e4bf79af5c87af304b4a315567a2e420ed604b8a936e08adecff6bb44001a71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free exploits' for games. The primary lure is a link to 'free-exploits-for-roblox-2021-game-hack', which is a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to trick users into visiting malicious sites, likely leading to further malware downloads or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-exploits-for-roblox-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/advanced-battle-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/ww-robux_GM431946152.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_004_off00005225.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5225 25756 bytes
SHA-256: 1ae60b9650ce3eafb26b661deba691dee32536d376abe6cca317d1f16e2995d9
font_01_sfnt_off00008deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEB 3088 bytes
SHA-256: 76103df973b80697c0c9d20bfcc20384c9e3729d1ea06ca7c21240c7eef2fa93
font_02_sfnt_off0000988b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988B 18748 bytes
SHA-256: 977b8255696cd79ccf41020987c5ae8611bf2b5e7dd2a0420fd6f1560be2c3ed

Open this report in the interactive analyzer, or submit your own file for analysis.