Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b39ed97ab21e24…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 19:14:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 077679e8399f4a9ccc4712320a1fb78b SHA-1: 667194ac4892d738028275b5cd6e4642ba0dee8f SHA-256: 41b39ed97ab21e246bc942aa57fedc8bc94b66f52365da5a4c2358c0b6fdfd75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free currency to trick users into clicking malicious links. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-daily-spins-link-game-hack, is identified as a malicious redirector, likely leading to further malicious content or malware downloads. The document body and heuristics confirm the intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/406889139/coin-master-free-daily-spins-link-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/google-chrome-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/descendants-2-games-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-promo-code-to-get-free-robux_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
font_00_sfnt_off000033ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AE 22368 bytes
SHA-256: 16562d9912c7ad1eb63f6191d02e780c5632094722f379c121dc33da038ce631
font_01_sfnt_off0000656b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656B 18768 bytes
SHA-256: 0ceb7b0488aaa16a0c23cac8de9df794ae3fa7cd27271b33a51c469a71425e8d

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