Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efbeca398d5d79b…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 12:35:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc0fab41b8d316d152a3d55f352a6dce SHA-1: 56fd96fbbaa7b91af48e7f0bc0f65ee37be81d57 SHA-256: 1efbeca398d5d79b3dbb7bcdff356dd7abc924902e06fdc864dd59314906cd96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency. The document body and embedded URLs strongly suggest a scam or phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a high likelihood of the document attempting to download and execute a second-stage payload or redirect the user to a malicious site.

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.tw/app/431946152/free-robux-no-survey-game-hack In PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/can-we-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-robux-without-survey-or-verification_GM431946152.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/static-moonactive_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/bc-free-roblox-android_GM431946152.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/sk8-hack-roblox_GM431946152.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.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
font_00_sfnt_off00002f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F85 21612 bytes
SHA-256: 66c36b34d99b22a8dd407ed3b7ed96f81b98f314a738d56587fb76d0e75bf7ab
font_01_sfnt_off00005ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE0 19012 bytes
SHA-256: 4e4ee538de79ec7e4a2325d57c934275716f5f92a64f1321ae55620a5fe6760f

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