Malicious PDF — malware analysis report

Static analysis result for SHA-256 9978426cc22dcc36…

MALICIOUS

PDF

47.9 KB Created: 2021-06-04 07:07:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 43c54c1bd446da77f89c70aecf274af0 SHA-1: 682e212a4f2977b80af9ede9f3dacd2642c469fc SHA-256: 9978426cc22dcc36431dd163d71e41f98a054d992b027f9d04dedf6b478d2957
200 Risk Score

Malware Insights

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

This PDF document contains a lure for game hacks and generators, redirecting users to a malicious URL. The ML classifier and critical heuristics indicate malicious intent, specifically a brand-impersonation credential phishing attempt using the URL https://netcdn.online/app/431946152/how-to-get-free-group-on-roblox-game-hack. The document body, though heavily obfuscated, contains references to this URL and other potentially malicious PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/how-to-get-free-group-on-roblox-game-hack.
  • 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/how-to-get-free-group-on-roblox-game-hack In PDF document text
    • https://library.stikesmi.ac.id/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E4 30036 bytes
SHA-256: f34fb91539633929a62fba8a3660b90cb06294a9a478873f76dd6de5eab22452
font_01_sfnt_off000097e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E4 18532 bytes
SHA-256: b0d12e0c12f45372347627aff55b798b13482e647669fb0a6dcc031dac2d8d94

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