Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2d1dea2af33fb5…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 05:06:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 08a5c42b21874b726dfb86095b6e6737 SHA-1: c8e62031aff20e6b7938179b9e0f6cc8b69f2a5a SHA-256: cf2d1dea2af33fb56ebca49aa103516fb69d90d614d64c992514977ac910e015
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to malicious redirectors and lures users with a fake CAPTCHA to trick them into clicking. The primary link, https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-verification-game-hack, is associated with a 'free generator / game hack' lure. The document body and embedded URLs suggest a social engineering attempt to lead users to potentially malicious content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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/431946152/how-to-get-free-robux-without-verification-game-hack In PDF document text
    • http://ims-77.fr/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://ims-77.fr/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/www-robux-com_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3E...No%20Human%20Verification%20-%20free%20robux%20no%20nothing%20but%20put%20username%20:%20Here%20in%20Roblox%20hack%20&%20Free%20Robux%20Generator%20you%20will%20learn%20how%20to%20get%20Free%20Robux.%20Roblox%20Free%20Robux%20Generator.%20Status%20Online.%20Last%20Update:%20May%208%202021.%20free%20robux%20generator%20for%20roblox.%20Free%20robux%20no%20human%20verification.%3Cp%3E%3Cp%3ERoblox%20unused%20game%20card%20codes%202019%20free%20robux%20generator.%20Free%20roblox%20gift%20card%20codes%20list.%20How%20To%20Get%20Free%20Robux%20For%20Roblox.%20If%20you%20are%20a%20loyal%20player%20in%20roblox%20surely%20many%20times%20you%20have%20wanted%20to%20add%20more%20robux%20in%20your%20account%20to%20progress%20in%20the%20game.%20Free%20robux%20card%20codes%20live.%3Cp%3E%3Cp%3Efree%20roblox%20generator.com%20pc%3Cp%3E%3Cp%3Eassassin%20roblox%20free%20exotic%3Cp%3E%3Cp%3Efly%20hack%20for%20roblox%202019%3Cp%3E%3Cp%3EWhat%20is%20Free%20Robux%20Generator?%20Now%20that%20you%20know%20how%20important%20Robux%20is,%20we%20are%20DonIn 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_002_off00004833.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4833 25880 bytes
SHA-256: f7432fa49f6cd2d461e295cd38727c1c24e9895aa561e044ebbac50e31cfe6dc
font_01_sfnt_off00008362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8362 18824 bytes
SHA-256: 0281466fb8102650472927f97d9f66b50e643d2599b7e46b014911a3118a4979

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