Malicious PDF — malware analysis report

Static analysis result for SHA-256 701b1d83780245f6…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 21:43:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8cb89351eff5831d16dec522fe3f5f60 SHA-1: b6552ce76a7fca014fa59f065a2f3ba94ba66053 SHA-256: 701b1d83780245f6e164c4dcab85e405a57ccf0bcaa4b29beb3cfce1c5fa0cc9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a prominent external URI pointing to sites offering 'hacks' for games like Coin Master and Robux. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or distributing unwanted software. While no scripts were explicitly extracted, the presence of these lures and the ML detection suggest an attempt to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-apk-iphone-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/tiktok-free-follower-no-human-verification_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/install-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/all-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-clothing-roblox-templates_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-items-on-roblox-in-a-game_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-project-pokemon-hack-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/admin-hack-roblox-kazok_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-executor-roblox-asshurt_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheats-for-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-pacifico-how-get-free-premium-car_GM431946152.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_002_off00002edc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EDC 23440 bytes
SHA-256: 8944a6432172ba655697f9477a9ee17d12aa29128c8cdfb08d0cf2e891842bbc
font_01_sfnt_off000063dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DD 18344 bytes
SHA-256: 48c41a6d06caede2bfe7c3afa9e405a795656508ab3dfdd406afe33248ac35d9

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