Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf73373b242ae559…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 22:09:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2326578d789a3a9c5a2566c1e589ff1f SHA-1: c3f632127a6b15d5860f923db54d5725556f0124 SHA-256: bf73373b242ae559b60109effdf3ddc41917e93bea5079238fa227444c9dedd4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at `https://netcdn.online/app/406889139/coin-master-free-cards-hack-game-hack`. The document body and embedded links are designed to lure users into clicking these links by promising game hacks and free currency. The presence of multiple redirector links suggests an attempt to distribute further malicious content or phishing pages.

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-free-cards-hack-game-hack In PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/my-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-hack-2021-android_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_off00005110.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5110 24888 bytes
SHA-256: c0db3f74dffc05e8045200a7da011379d61d31844a6223abf913fbbe18c84514
font_01_sfnt_off000089d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D8 18056 bytes
SHA-256: ad4f2d10031887feff52537d65cf9a04719575ebe7be64232d8e0b4f73fdfdc1

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