Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d14a15285438310…

MALICIOUS

PDF

226.8 KB Created: 2021-07-06 08:50:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4eb94535f8ca7899399285acf62f4e48 SHA-1: 859694dd8b39859cb8b2d5688a054f3c90d6e67c SHA-256: 7d14a15285438310a7912234be70655f5a9394f1deddbb9d9e9f311dd48f51c2
250 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating social engineering lures, including a fake CAPTCHA, a game hack redirect, and a browser extension installation prompt. The primary URL, http://netcdn.tw/app/1094591345/pokemon-go-accounts-free-list-2021-game-hack, is associated with malicious redirector infrastructure and is presented as a lure for game hacks. The document body, though heavily obfuscated, contains references to this URL and appears to be part of the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://netcdn.tw/app/1094591345/pokemon-go-accounts-free-list-2021-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/hacker-para-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-hack-2021-lenovo_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-november-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/arsenal-fly-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/hacken-on-roblox-hin-zuzu_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-lua-executor-cheat-engine_GM431946152.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_023_off00031e56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E56 25576 bytes
SHA-256: f0cb77e1ca31445a4739a5b08c0f4f5ffd7d7121eb8e2e7f44eb884056d0d866
font_01_sfnt_off00035a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A51 19124 bytes
SHA-256: 2ab3e41cc0c97c492b837799337d06bbbf91bc11e6bf04c5defc80462fa42962

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