Malicious PDF — malware analysis report

Static analysis result for SHA-256 396f09b6dea86815…

MALICIOUS

PDF

46.0 KB Created: 2021-06-08 23:06:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e13c79c5991012f02011f213d6a9a622 SHA-1: 7c821d46f05fcc93b8b4e91b292947a6e61f1d01 SHA-256: 396f09b6dea86815587e478d3526cfa5eac22ef7a1d0e68462f01c9c6af982ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a 'game hack' generator, identified as malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the same URL, suggesting a lure to download potentially malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/how-to-loop-jump-on-roblox-cheat-engine-game-hack In PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/roblox-levitation-animation-pack-free_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-robux-gift-cards-2021_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/coin-master-hack-twitter_GM406889139.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_off00005482.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5482 24612 bytes
SHA-256: f43299cb3094e8a9340fab4d3708cb6e9795a7b823a0f457cf63d002a8b89819
font_01_sfnt_off00008d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D53 19596 bytes
SHA-256: 9022b7208b4fec8bf25709fca081ad81ad2575e166589f4e7b1be2f17c29f5f2

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