Malicious PDF — malware analysis report

Static analysis result for SHA-256 54af85345bc07caa…

MALICIOUS

PDF

197.2 KB Created: 2021-06-11 03:36:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f0f9822866cccaa336a7f96492870b18 SHA-1: 30ca7d4ce28d168dba463f7fee06c8230ad0ce60 SHA-256: 54af85345bc07caaf63c096899d1272d8f78fcec10b043313732c28816d42c73
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA and a "free generator" lure to deceive users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, suggesting a malware distribution or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8041

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/noclip-hack-roblox-prison-life-game-hack In PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/rbx-sites_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-ro-gwet-free-robux-on-tablet-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/a-vide-on-how-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/mistplay-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3Efree%20stuff%20hack%20roblox%3Cp%3E%3Cp%3Efree%20robux%20codes%20for%20iphone%3Cp%3E%3Cp%3Eroblox%20hack%20no%20verification%20real%3Cp%3E%3Cp%3Efree%20roblox%20executor%3Cp%3E%3Cp%3Ehow%20to%20change%20your%20name%20on%20roblox%20for%20free%202020%3Cp%3E%3Cp%3EEarn%20free%20Robux%20by%20playing%20easy%20games%20and%20quizzes!%20Instant%20withdrawal,%20no%20minimum%20payout%20and%20no%20password%20or%20registration%20required.%20WeIn 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
font_00_sfnt_off0002b695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B695 23612 bytes
SHA-256: 95b53e8b483cd073851b29f0e30603d34fbb42561f75ee00d79fb14ef30f9e68
font_01_sfnt_off0002ec40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC40 18632 bytes
SHA-256: 9e2a2908f3fc166817d68aa202587205c27ea886d41796a38ad5d760b9f1f75a

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