Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85e52a0276361e0…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 08:06:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a1b02add74e1ee7d72c8bbb137b33d74 SHA-1: 24151e079a0f7c4f01a53796b8dd03a9454c802a SHA-256: c85e52a0276361e056c99fa2dd87efe2d5dbfeffef879127f46f6ea99e7ec2df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and generators. The primary lure URL is https://netcdn.online/app/406889139/coin-master-hack-2021-free-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/coin-master-hack-2021-free-game-hack In PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/tiktok-free-speech_GM835599320.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/tiktok-free-online-unblocked_GM835599320.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_off00004f19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F19 25276 bytes
SHA-256: 1c6306f63f118073ebd3b75cbff488978cf94ea583e162f193ee8b8b0abff5f9
font_01_sfnt_off00008893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8893 18284 bytes
SHA-256: 24548c4fb8e2ba96ea34c2ab549c5298a51cd3d4936d0c2ae8965e87a81b14d2

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