Malicious PDF — malware analysis report

Static analysis result for SHA-256 09637284440842ad…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 09:19:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f684f04a6942ee8edc144563abf975ea SHA-1: 97f6775e8b74601a55b6add5d7f6ccd445a945cb SHA-256: 09637284440842ad0f603f43d705b7f8bd2284fec3ace93e20c1416f3cf4eb92
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/free-spins-for-coin-master-game-hack. The document body and heuristics indicate a lure for free game items or hacks, likely leading to further malicious content or malware. No scripts were extracted, but the embedded URLs and redirector activity are strong indicators of a phishing or malware distribution attempt.

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/free-spins-for-coin-master-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-ser-hacker-en-roblox-en-todos-los-juegos_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/ant-man-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheats-for-good-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hacker-shirt-template_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-hats-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/bloxfree-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-into-bloxburg-for-free-in-roblox_GM431946152.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_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22424 bytes
SHA-256: 7eb35fb76fac848d523bf586c9c12f8e8fd441b0223c1a52add95ca9bddae66a
font_01_sfnt_off000061fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 18176 bytes
SHA-256: 0b37b87f907bc50fa1e450587a0e1f43116f92b011bc5b47444974eee354eb2f

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