Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9cadaed52024e9…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 14:02:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d2821d9217fc12abdb9c3abb2377d4f0 SHA-1: 5218687df95876cd79136b7c62d301536cd65122 SHA-256: dd9cadaed52024e993f26e0e3ddb5f81b1ca05901e5198e5b80546a176a94bf0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks' for popular games. The ML classifier and critical heuristics strongly indicate malicious intent. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest a phishing or scam attempt, likely intended to lead users to download further malware or compromise their accounts.

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.online/app/431946152/free-roblox-acc-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-hack-coin-master_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_off000052ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52ED 26728 bytes
SHA-256: 43845696f98c8850ce2b4bf95c384d6f4fa52e3e99500be071be84c1cbc8c737
font_01_sfnt_off0000906e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x906E 17948 bytes
SHA-256: 74db3e5e7aeb6f0756448051187db7defe34e7c9b7f0bab0dc8e4ffe2ac72fee

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