Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50fd42284133cc9…

MALICIOUS

PDF

35.5 KB Created: 2021-06-21 20:24:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e3fd07f6ae71acd6d2e6e946aa0a9404 SHA-1: 1ea8446f34222276167753ec3346c6c998842f30 SHA-256: d50fd42284133cc913214038ef0262a646da01be08a7a31257c4ccb34184b0f5
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malformed stream and a critical heuristic firing indicates it links to a known malicious redirector. The document body and embedded URLs promote 'free Robux' and game hacks, a common lure for phishing or malware distribution. The primary URL leads to a redirector that likely serves a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.co/app/431946152/free-robux-without-human-verification-real-game-hack In PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/a-hack-to-open-the-applications-on-roblox-got-talent_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-hack-accounts-on-roblox-easy_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/bunny-face-mask-roblox-free_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/hack-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/working-coin-master-hack_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000319e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319E 22604 bytes
SHA-256: 94dc93cbe6f5545f924cd6bdab09f5a1cbe3a7cf94a508b4437a1cfcb2980473
font_01_sfnt_off0000640c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640C 19772 bytes
SHA-256: fc568478bc399a77401a6ddd4d7c7c349cb7de37f92cd72754d4c54c01944b1d

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