Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3781f64214dbcd7…

MALICIOUS

PDF

227.8 KB Created: 2021-07-03 10:03:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 93422f00f2107f2ee4d9d4ad75bf45d1 SHA-1: 6c672ad775b4563ff2f208c47c5066dc0f785f9b SHA-256: a3781f64214dbcd7b20191017f85eb1ed77f0d055479bb74f61247f808aaa297
250 Risk Score

Malware Insights

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

The PDF document contains multiple lures, including a fake CAPTCHA, a download button, and a browser extension installation prompt, all designed to trick the user into clicking a malicious link. The primary link, http://netcdn.co/app/1094591345/how-to-get-free-xp-in-pokemon-go-game-hack, is identified as a malicious redirector, likely leading to further malicious content or malware download. The document's content and heuristics suggest a social engineering attack aimed at compromising the user's system.

Machine Learning

  • Nyx PDF Classifier clean score 0.0117

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.co/app/1094591345/how-to-get-free-xp-in-pokemon-go-game-hack In PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/roblox-zombie-rush-hack_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-get-free-gamepasses-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/roblox-catalog-free-2021_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-get-20210-robux-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-dop-the-flying-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/roblox-cheats-to-get-2021-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-make-an-account-on-roblox-laptop-for-free_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/best-free-roblox-t-shirts_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/hacker-news-roblox_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-hack-peoples-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/is-minecraft-free_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_023_off00032288.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32288 25576 bytes
SHA-256: 092c6294dc1dd651753e0b1d6adf16f0e0e6a9c71d517830900225ad2631c88c
font_01_sfnt_off00035e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E76 19032 bytes
SHA-256: 840d28234bdf83cc30ce23698b69b699a400dc15b044d85cfe7c85a725f9a989

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