Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3fed177e37809f4…

MALICIOUS

PDF

42.0 KB Created: 2021-05-16 07:07:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2d104eb80b59de6536755c496a1f0938 SHA-1: e3b6485ec23cb7beda11664a4b9c4b1559fa6f6f SHA-256: f3fed177e37809f4839e6d90c265e2d8ffe682a5053074c048f970d4fd2a9405
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into interacting with malicious links, specifically targeting "game hack" generators. The primary link directs to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit user interaction, likely leading to further malicious content or downloads, potentially involving JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-daily-free-spins-game-hack In PDF document text
    • http://bunadsmaria.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://bunadsmaria.com/images/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://bunadsmaria.com/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://bunadsmaria.com/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/robux-today_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/minecraft-free-minecoins_GM479516143.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_003_off000047f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F8 25064 bytes
SHA-256: e7b74eee094c135d34ed2433ab6c78c9cef5821fbffcc082c1ebd1fd36b93316
font_01_sfnt_off0000818e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818E 18308 bytes
SHA-256: e42bde5f0ce420544e36e42831a39ceefa2103814e02a0c87b67b282abd28734

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