Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cf524f2c8a41b9…

MALICIOUS

PDF

34.5 KB Created: 2021-07-01 10:02:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3353da5ca0c9b24d2a385cff8812fa42 SHA-1: 24edc40269a16a3cd7b6d4671cea53663a64e64b SHA-256: d5cf524f2c8a41b935b133269f71175dab45ba2c72e683d24b99c81db684287c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to known malicious infrastructure, specifically advertising game hacks and generators. The document body and heuristics indicate a lure to click on these links, likely leading to further malware download or phishing. No scripts were extracted from this sample, but the embedded URLs and heuristic firings strongly suggest a malicious redirector.

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/knife-server-roblox-hack-script-pastebin-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-pet-simulator-lua-script-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/boku-no-roblox-accounts-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-store-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/best-free-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/10-know-this-give-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/tiktok-free-wala_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-cheats-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/all-free-items-on-roblox-2021_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_off00002e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6E 22572 bytes
SHA-256: 4abd9d8026f34a1de639da5a226a8bec8484bcb94a4008aa861f2a70ba1cbe6d
font_01_sfnt_off000060ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EF 19324 bytes
SHA-256: 9e6a53aa194f1e7bfafbbae2b68a4853b6d1c6ff61dcce1c10ee7cb93dfc5fb0

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