Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5065fe21582a91…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 09:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7c56cd2a1aceb5d0d9d5ab02d4064b62 SHA-1: 40a52cfb593d2b7b8c83dedadd0d6698eab316fc SHA-256: 2a5065fe21582a91e787c8f998771805654d7fc371e772fbf657ad689c98191b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a prominent external URI pointing to websites offering game hacks, suggesting a lure for users to download potentially malicious content or engage in scams. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample, limiting the analysis of direct execution capabilities.

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/get-hacked-roblox-account-back-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-website_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-free-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/rbx-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-often-pubg-uc-advance_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pubg-5-uc-buy_GM1330123889.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_off0000504c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504C 26772 bytes
SHA-256: 5c2571e5a08193b73cb0db2d2829b8e9964d4d4100f4319b3c2e631d0e791323
font_01_sfnt_off00008c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C85 18600 bytes
SHA-256: b45e45e56d550e0d711e834ce67473a5d117df07677f09f1f778681aa693a8c9

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