Malicious PDF — malware analysis report

Static analysis result for SHA-256 23018abf72ae3945…

MALICIOUS

PDF

48.7 KB Created: 2021-06-08 17:02:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: adc9be381394439592b312f3ac8ec570 SHA-1: 34bd8a526930f7eeb8f380aa9c37cf7aed4402c4 SHA-256: 23018abf72ae3945240eb9f3a7fce4a38e8f35537883731515ad0a7eddf93188
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free currency generators to trick users into clicking a malicious link. The link leads to a redirector infrastructure and ultimately a fake CAPTCHA page, designed to deceive users into executing further actions. The document's structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at credential harvesting or malware delivery.

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-can-you-hack-get-coins-in-roblox-knife-capsuls-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-converter_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-coin-master-spin-ios_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_off0000510f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510F 25832 bytes
SHA-256: b4aed136092d1a4a05efaa2217dc9105f4883e9f99da805c0740de5172e917f7
font_01_sfnt_off00008c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8C 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9934 19048 bytes
SHA-256: 53e7c5c20116d3f0282c5b18ed29a25ae9e151d410074cb655c767ae08736c24

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