Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e36045c2c632a8…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 22:33:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 691886b6cb7c1046e287b21b0be9cfe6 SHA-1: 4b0d3583e17471a236a26189d575b621e61e42a1 SHA-256: 42e36045c2c632a83e78b8a1ad01f1ec9c9db3df8cf6aef3706e9927f7e8b6f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free generators' or 'game hacks' to lure users. The primary redirector URL is https://netcdn.online/app/479516143/free-domain-for-minecraft-server-game-hack. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/479516143/free-domain-for-minecraft-server-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/pokemon-go-free-team-change_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005171.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5171 27128 bytes
SHA-256: 8048a2d5e625496c4cb6060d6b59faed38799b74b726ed78bd9506860c00751b
font_01_sfnt_off00008e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1F 2892 bytes
SHA-256: e0a0e7499c3dd10c5114bd1538d6e258e6cb3acdd4f79d9538668087a4bdd2cc
font_02_sfnt_off00009808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9808 18252 bytes
SHA-256: 7978d84717849f7fe583135464e7fa2f965b05bc02f62d7a17151b102e6c088e

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