Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f394d3df031f67c…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 07:39:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 402a4ed1447d6909bdfd6e7a066dfcd9 SHA-1: 6b09dfb948183c648930be8970da6bd1236da98c SHA-256: 4f394d3df031f67c333ab5c2aff3485bfdc895463e57b1a68104ed2be6a83362
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/lazy-blocks-com-free-robux-game-hack In PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000484a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484A 25292 bytes
SHA-256: cc7862eaf86bf8051f31ce5b56b1b32cc4a224d6065f10efcde2d871b94b49db
font_01_sfnt_off00008236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8236 19008 bytes
SHA-256: 34c8d34d38b90765c6e33941713304debcf78082891e10a16d595afa5c3321d4

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