Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d07f63b6cedaa5e…

MALICIOUS

PDF

227.5 KB Created: 2021-07-08 11:50:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 36b233b56365eecb7c852dade494496c SHA-1: dbe96100dd56dd21670c24cea44487872e3d37c7 SHA-256: 2d07f63b6cedaa5eeb71a05646fc1892b6b5bbaaff3fcb7acc6495e8693f2ee4
250 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating a malicious redirector lure, specifically advertising a 'game hack' to entice users. It also presents a fake CAPTCHA and a browser extension installation lure, common social engineering tactics. The primary IOC is the embedded URL which leads to known malicious infrastructure.

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-free-8-generation-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/cheat-codes-for-ninja-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/cheat-engain-mac-for-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-blotch-shikai-hack-script_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/report-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/conquer-3-money-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/get-free-robux-by-entering-this-birthday_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/new-hack-work-100-roblox-deathrun-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-hack-tix-and-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hacks-da-hood-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-make-clothes-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/robux-for-offers_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_off000321c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321C8 25576 bytes
SHA-256: 6d349c474d231132def7861c43f3c442b545cfbc24fc66043ea6d45527b8d947
font_01_sfnt_off00035dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35DD0 18792 bytes
SHA-256: e3a26b47b946cf8ca2b62a5d9e578c331e4c6722823501156c8e22880284dfbb

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