Malicious PDF — malware analysis report

Static analysis result for SHA-256 17dfc54615be7d4c…

MALICIOUS

PDF

52.5 KB Created: 2021-05-16 02:46:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c70ab84bc90369144d0e7fd917af2d60 SHA-1: 3e9089fda8f34cfe3c3fb4e8a2a27c04e659a3d0 SHA-256: 17dfc54615be7d4cfc38ab1d1c257546a77261a010fd690cf65373caa257b92e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure, 'weird-roblox-game-hack', is hosted on a known malicious redirector. The document body, though heavily obfuscated, contains references to these lures and embedded URLs, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9324

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.xyz/app/431946152/weird-roblox-game-hack In PDF document text
    • http://mbbs.hr/files/wurst-18_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/demon-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/robux-xyz_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-app_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_003_off00004962.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4962 38884 bytes
SHA-256: 0fbf91f25a0ea7a779c397273756ab131badad28836348304012c68d650387ad
font_01_sfnt_off00009e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E53 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000ab64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB64 18276 bytes
SHA-256: 1b4cc20e0ac8438115b264510fe10e2d41ecb60e73830c90cadb3a3c1b276198

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