Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd0af7a082fb990…

MALICIOUS

PDF

44.8 KB Created: 2021-05-10 16:53:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 609fea70954f96d033a21329dc1b4e8a SHA-1: 3049834be79bbfcde517a624bd76e6a929c39219 SHA-256: 0dd0af7a082fb9904fe6c8bb9c0e30c12bd615f2f4f035f82a887bc5a1bcdc4d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors, masquerading as "game hacks" and "free generators." The primary lure is a "Coin Master Hack Apk 2021" which redirects to `https://netcdn.xyz/app/406889139/coin-master-hack-apk-2021-game-hack`. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely to download further malware or engage in scams. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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 https://netcdn.xyz/app/406889139/coin-master-hack-apk-2021-game-hack In PDF document text
    • http://foo.com.tw/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/robux-now_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-game_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_003_off00004b17.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B17 29652 bytes
SHA-256: 7f017f19dbc2f9f0b91f57a24b0421b503968ead9f99ea47f81738cbd991b315
font_01_sfnt_off00008ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE7 18296 bytes
SHA-256: bf349ca5353405da50dde13ab4b8c776ba4b0a629ab8eb4a4600605684f4a994

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