Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa6400b436ed840…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 06:52:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b7801dabb3f43f9ff28e060894457e31 SHA-1: 52894e61b7b137c396d98ce3d6108b90d2f2e74e SHA-256: 1fa6400b436ed840708ee93cf16fcdacddc7e4812c7186c889c9a0122306d35f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, specifically advertising 'free generator / game hack' lures for popular games. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-today-daily-links-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into clicking through to potentially malicious 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-spins-today-daily-links-game-hack In PDF document text
    • https://deutsch-study.com/image/data/files/como-ser-hacker-en-roblox-android_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/hack-roblox-espaol_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/roblox-rocitizens-hack-2021_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/cheat-engine-roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-5-000-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/pubg-uc-buy-cheap_GM1330123889.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-find-free-items-in-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/gamehackbiz-roblox_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-hack-roblox-pokemon-go_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/robloxs-got-talent-cheat-tuto_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-hack-coin-master-pc_GM406889139.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_off00003307.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3307 23016 bytes
SHA-256: a50578bd44b500be4b9f7f2b1ea8d71e8c521c2355db44c2be21f18ec788057d
font_01_sfnt_off000066df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DF 18940 bytes
SHA-256: 74e1d82992a432109423c701e24adf08bd24e863db22c1b49c4282e3a69c5270

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