Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee78ff558dcf8ef…

MALICIOUS

PDF

44.4 KB Created: 2021-05-12 15:00:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6c2b9c74efcdbbe66156e01d257e9a43 SHA-1: 365a66478b62d5b89dadae75c28473b961fa601e SHA-256: 7ee78ff558dcf8ef3a38865249090020eb0a94d138c9148d4564369b52042cf3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering free game currency or hacks, such as 'free-robux-no-human-verification-generator-game-hack'. These links are designed to lure users into clicking, likely leading to further malicious content or downloads. The presence of these lures and the ML classifier's high confidence score indicate a malicious intent to exploit user interest in free in-game items.

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/431946152/free-robux-no-human-verification-generator-game-hack In PDF document text
    • http://butkimloai.com/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/rbxcity-free-robux_GM431946152.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
font_00_sfnt_off00004532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4532 25696 bytes
SHA-256: 5627120c8d1e51d472ad3b90604d0c5d9449ea677616407e557fffe9715dafa9
font_01_sfnt_off00007f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F82 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8932 18860 bytes
SHA-256: d7f1bf4664d5c073c741d68610eb5dcf28a8fd63084b2bf56aee4ef09f8af4a0

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