Malicious PDF — malware analysis report

Static analysis result for SHA-256 391581f2de8bea12…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 12:17:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: efe9be8e9127038c0d3f7278c37912c1 SHA-1: 25cd75889dd019e257bf4bc9220c7fc566644553 SHA-256: 391581f2de8bea12cec9743dfdf4a64aac60e682088271523d291af7060e7c17
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 "game hacks" and "free generators" for popular games. The ML classifier and heuristic firings strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the links suggests a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/anonymous-hacker-script-roblox-game-hack In PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/get-robux-for-free-generator_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/claim-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnurussalamtersono.sch.id/__statics/gudangsoal/files/free-robux-giveaway-now_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
font_00_sfnt_off000054b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54B2 24584 bytes
SHA-256: 3067a39d9c427cf78afb2ee059140fba5c70b2c3ff9df4e3b15f664ea9d75537
font_01_sfnt_off00008d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D59 19164 bytes
SHA-256: deb5a2cc1dd161d8976fb4cf4b32d5dac90b79e93ade4b29759ffc22c61a405d

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