Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe176dcf1e74a45…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 04:37:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3a90a0520c201dbfb0bb39ec5a286cff SHA-1: 874dbc68b899f91910cb385f3a3f8d19541ffa28 SHA-256: 6fe176dcf1e74a45ac98b9fb8fe1a2df9ee254dec703c5fed31d7c8d3fed90f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free generators. The primary malicious URL identified is https://netcdn.tw/app/479516143/minecraft-games-to-play-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

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.tw/app/479516143/minecraft-games-to-play-for-free-game-hack In PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/pubg-uc-details_GM1330123889.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/where-to-buy-pubg-uc-cheap_GM1330123889.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/roblox-mobile-hack_GM431946152.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_off00005163.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5163 28332 bytes
SHA-256: cd90eb5a75169949858a7cf78a68a8082b4a71ff6fed93397b2f22548bba7d1c
font_01_sfnt_off00008fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB7 18380 bytes
SHA-256: e4e6021f190597b5ba2cc648d82e873dd3d7a425745f666e69b81b8efe23a832

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