Malicious PDF — malware analysis report

Static analysis result for SHA-256 686b48f18798b2b3…

MALICIOUS

PDF

34.7 KB Created: 2021-06-19 01:41:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d6c915407d40ebb6df19d9a7d3549ce1 SHA-1: 2fab76eed6986a2cc340d05fe27b38f346e9da18 SHA-256: 686b48f18798b2b3ba227cb58a09c1d29100e6736955d7eb5ead553bf266d2ea
160 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, masquerading as a game hack download. The 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristics confirm this behavior. While no scripts were explicitly extracted, the nature of the lure suggests a potential for further exploitation or download of a second-stage payload, likely involving client-side execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-de-una-espada-ra-roblox-game-hack In PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-arsenal-hack-script-download_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-how-to-hack-gravity-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-cheat-in-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-november-hack-roblox_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/acheter-des-robux-free_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/lollipop-simulator-hack-sckitp-roblox_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/robux-games_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-get-a-free-robux-card_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_002_off00003044.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3044 22348 bytes
SHA-256: e667e039a099e6e00a4c4e3f7bd548010fa17f422d8d1bc55c4f8c6bf8e55e54
font_01_sfnt_off000061e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 19172 bytes
SHA-256: 70128ba36039884782ef962f1d9512c00cecb4f6ce9ef5e37d1548a757c35dee

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