Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ff6807d24d80d2…

MALICIOUS

PDF

44.5 KB Created: 2021-05-12 05:16:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: cbd48f7082beb6a5a1f142bc0e5c304f SHA-1: 3b6cfbd56abdfdc6324cfca1a577402e0cf075b0 SHA-256: e9ff6807d24d80d2f9738f2e7e6cdecfb3b6d961d6bdfae4a8a1654317ded6f8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and websites offering "hacks" and "generators" for popular games. These links likely lead to further malicious content, such as malware downloads or phishing pages. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign, likely distributed via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coin-master-online-hack-generator-game-hack In PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/rbx-com_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/minecraft-115-2-hacks_GM479516143.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_003_off00004859.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4859 25408 bytes
SHA-256: 5085d2abc63c87664a52efc7562ce0dad935c452d2e4bfae90da88cecbcf1c5f
font_01_sfnt_off00008319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8319 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBB 17788 bytes
SHA-256: ad851a765ea361b6c06a758d3cf3a23c1a0806d07c65aa9d09c455148703e502

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