Malicious PDF — malware analysis report

Static analysis result for SHA-256 282a995e02507e3d…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 12:06:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8c5237eb3f6d30efff892d2c6bb6da49 SHA-1: c5a6661edc8d488cdcff6a799bcd39acb47c2ac7 SHA-256: 282a995e02507e3d24faee389ca237311875a44e855f12f7835bbd4df6a9cfd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically promoting game hacks and cheats. The primary lure is the URL http://netcdn.tw/app/406889139/how-to-hack-coin-master-spin-in-hindi-game-hack, which is associated with malicious redirector activity. The document body and numerous extracted URLs reinforce this theme of offering illicit game-related benefits to entice users to click through.

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/how-to-hack-coin-master-spin-in-hindi-game-hack In PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/roblox-afk-cheat-download_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-wolf-tail-roblox_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-card-giver-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-see-chegg-answers-free-tiktok_GM835599320.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-roblox-gift-card-codes-2021-august_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/roblox-new-organized-hack_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-anything-free-on-roblox-ios_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/download-roblox-hack-for-pc_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/rbx-earn_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_002_off00002fe5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FE5 22504 bytes
SHA-256: c3076b19a8fdf0ac7ef05252f3bd5ae6740a7c9a8842608bd8d87e50040927de
font_01_sfnt_off000061d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 18520 bytes
SHA-256: a858dd88c372e08a0f3d9237032407f953de1c9476e9d76775859c952356f15c

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