Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7fef5d4c912723…

MALICIOUS

PDF

49.0 KB Created: 2021-06-08 22:37:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bad9d32a5865923c5856d3a6a106bced SHA-1: 9f1a6b0e94dc890f7c07befaf8a6c5238bef066f SHA-256: ed7fef5d4c912723d6b744080f11bfb304f9a6406ab38c2b14c52664d9ca03e6
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure for game hacks and displays a fake CAPTCHA, aiming to trick the user into clicking a malicious link. This link, 'https://netcdn.tw/app/431946152/how-to-download-roblox-jailbreak-hack-cranberry-game-hack', is associated with known malicious redirector infrastructure. The document body also contains this URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-download-roblox-jailbreak-hack-cranberry-game-hack In PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/robux-link_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coin-spin_GM406889139.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_004_off000054e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54E0 25444 bytes
SHA-256: bd44a8b4eac5e01802ff2f2d71b9ced824c19ea64e36b6d634eb9d69efb9869b
font_01_sfnt_off00009012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9012 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000099fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99FD 19156 bytes
SHA-256: 00a8533e09ceb31a609aa53c54a07402969548bffb5368a6917c2d59e52a5d02

Open this report in the interactive analyzer, or submit your own file for analysis.