Malicious PDF — malware analysis report

Static analysis result for SHA-256 f744b9012f3b0fe3…

MALICIOUS

PDF

43.6 KB Created: 2021-06-11 01:20:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 15009af162738c9736ffd79b51a31caf SHA-1: acb368f5998c6deccb1f8258fb9b1d7a5f97a2f8 SHA-256: f744b9012f3b0fe394c7a452f69d210c00a8704ceeefe88c05cc3cd6caf36aed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game-related cheats and generators, directing users to a known malicious redirector. The embedded URLs and document content strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the overall pattern indicates a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-roblox-cards-codes-2021-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-murder-mystery-2-cheats_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/can-any-codes-give-u-free-robux-2021-working_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/advexplore-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/best-free-minecraft-hacked-client_GM479516143.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
stream_004_off00004c69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C69 24928 bytes
SHA-256: a3c224575358ccecdf1e990b4ec87781be1cc6741ae9b802c50d8adb416cf512
font_01_sfnt_off00008611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 18752 bytes
SHA-256: 6cb2339426737bb64ab88edd3767f946b4c58fc4edcdb2b654d327f796c0e3ca

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