Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a88b8a97709f3c…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 21:26:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a25a967ca849cf2b6260cfa35d5e352e SHA-1: 60ff8f8c1f8a114ae54b4c74be3a34b3a09b55df SHA-256: c7a88b8a97709f3cf1e6336cabff8ec4fecef72dd81a30b96ead09af1fdf068a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector infrastructure. The document body and heuristic firings indicate a lure for 'free generators' or 'game hacks', suggesting an attempt to trick users into downloading malware or visiting malicious sites. No scripts were extracted, but the presence of embedded URLs and the nature of the lure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 3

  • 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.
  • 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/how-to-get-free-robux-playing-a-game-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pubg-uc-10-rs_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hacked-roblox-accounts-list_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_004_off00004df4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF4 25444 bytes
SHA-256: a111be7942c13e84142ce8fc9bc7511eef07225d1be8b3f5599adf9c03ccd3fe
font_01_sfnt_off00008885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8885 3024 bytes
SHA-256: db5bba01bf895c29c9b70d97e4d82e1a674769f630e1dac72047120c2e770ac7

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