Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9038577b51be900…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 07:18:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 281159ffc743583ce246c4e6ce3f5c0a SHA-1: 30f0e76d616fdb9ac5f3c37447bfabb146e2f048 SHA-256: f9038577b51be9009896ea6ee642e7d3af1d68b2b736465ce2bb5a023459afb0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'free land' for popular games like Roblox and Coin Master. These links ultimately lead to URLs that are likely part of a phishing or malware distribution scheme. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful 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.co/app/431946152/roblox-lumber-tycoon-2-how-to-get-free-land-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-how-to-increase-speed-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-promo-codes-august-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-de-juegos-apk-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-do-i-hack-a-roblox-user_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-on-iphone_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_off00002ed0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2ED0 22888 bytes
SHA-256: b312e380bac77cf7acd461c45d82f1b7dc4cbc8caba14acf533d1fa89d25ffcf
font_01_sfnt_off00006220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 19796 bytes
SHA-256: 1475b2a037722e6261a7ab70a91a1673038c67b1df2b57d0a80cf887c6bf3780

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