Malicious PDF — malware analysis report

Static analysis result for SHA-256 6439b1f2745fd421…

MALICIOUS

PDF

50.6 KB Created: 2021-05-13 14:26:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e4cc3b9c92526ae92f6628d1da6bb04e SHA-1: f0776fc8cea2206659066f40314e1641835e7f0a SHA-256: 6439b1f2745fd421e05dfd3ed5eb71b45abf858f5be16df9b9b046b42d2db3e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and generators. The document body, though heavily obfuscated, contains URLs that are consistent with this lure. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead the user to potentially harmful content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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/406889139/coin-master-unlimited-spin-apk-free-download-game-hack In PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/earn-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E85 24204 bytes
SHA-256: 7b2d8ec9d2ecea9df6c5e501a84385cfe4097a797a29ba338df0228c67b5d888
font_01_sfnt_off000085d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D7 5272 bytes
SHA-256: 150955d7eacf53775e9b58886286d6a68f3b71dd575ca7400e2f21e2b90cd8db
font_02_sfnt_off00009711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9711 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA100 19084 bytes
SHA-256: c2d82cd4a12004e31f0bd3c8b1caf06db58ba118ed59957898480102bbe81bed

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