Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb60f50c1e19ea9…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 13:00:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: bf9a4f936e9ea9816eeecf2230b5dae1 SHA-1: 0369c097445df3d7e454fb0f2ef34a5a33b056be SHA-256: 7fb60f50c1e19ea95a2084fb4108a5a690fc86864634c20c47eca1660649a70f
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 free game hacks and generators. The primary link, http://netcdn.tw/app/479516143/how-to-play-minecraft-with-friends-for-free-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/how-to-play-minecraft-with-friends-for-free-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-music-id-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/edit-this-cookie-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/pubg-uc-egypt_GM1330123889.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-youthnow_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
font_00_sfnt_off000035a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A5 22700 bytes
SHA-256: a1116dbf1b5bd1e917161c5fca5d9b966f434ed1bb08f6b74c072d9d22faa82a
font_01_sfnt_off00006802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6802 19108 bytes
SHA-256: 5162437770a110f8fb1f842d380ac1671e371cd1c83a627391e03ed6502866fc

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