Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c590049785d377…

MALICIOUS

PDF

48.3 KB Created: 2021-06-03 05:05:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 800f469f949e9ced38c6eed6a082e152 SHA-1: 46e43c644dcddc417db5f2a1f628a2ef80ab6e90 SHA-256: b1c590049785d37763de15d96462b674da9f71c342e31911d81be7dda645c2ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL pointing to a resource promising game hacks, and the ML classifier strongly flagged it as malicious. The document body, though heavily obfuscated, contains similar URLs and text related to obtaining free in-game items. This suggests the file is designed to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9768

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.online/app/431946152/robux-hack-no-verification-game-hack In PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-clothes-on-roblox-2021-no-bc_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/cheat-engine-clone-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000519c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519C 26904 bytes
SHA-256: 20b72ac6aa8e73531efca2878a25918e910b7528ec205d6a360e7197f47e8c3e
font_01_sfnt_off00008e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000097c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C4 18968 bytes
SHA-256: 5ba47707bbe3bdf260b7e3c7f9d29576bc5adede41455b10dbe7169070a6f464

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