Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1274648d38dac94…

MALICIOUS

PDF

47.1 KB Created: 2021-06-08 13:48:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 825344ebfbb9be3de6714f0c4149a132 SHA-1: 7557667abcd289bc204cbbaf6276fa07f00decbd SHA-256: d1274648d38dac944da91a4503584012e0b1c144b1281bdfde6b6c9a61b81d9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary link, https://netcdn.tw/app/431946152/robux-free-really-pls-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/robux-free-really-pls-game-hack In PDF document text
    • http://eltisstudio.sk/images/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-roblox-card-generator-need-to-do-nothing_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-online-games-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-get-free-robux-in-adopt-me_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/what-tiktok-free-movies_GM835599320.pdfIn PDF document text
    • http://eltisstudio.sk/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D9 24848 bytes
SHA-256: bd257a4b9ff886a84f4fe76218af9ac2fdbb47e62f86d37a39892f8471459e1b
font_01_sfnt_off00008a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A88 2820 bytes
SHA-256: d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b
font_02_sfnt_off00009422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9422 18648 bytes
SHA-256: 701e8fc7246e6071909fa78fa0b3449a418f47bdbf8d091caa2f3ebdce3c5544

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