Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c281b355f7ef10…

MALICIOUS

PDF

46.1 KB Created: 2021-06-11 07:05:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1771da37b2cc459d622ba849dc99edc5 SHA-1: c5bc9110e0243ca6809e07442464b0f6e40520c4 SHA-256: 84c281b355f7ef10c357bc5afadebec11d33e127cdcf17550852c432fdd312c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one specifically advertising a 'Roblox Hack Game Hack'. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary function appears to be redirecting users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/hexaria-roblox-hack-game-hack In PDF document text
    • https://www.croatia-flyfishing.com/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/roblox-magic-training-wand-free_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-hack-codes-2021_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_004_off0000553d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x553D 26680 bytes
SHA-256: 6767688c57f9e38a4598b1fcb8efa119204b3bb9d5c21bb6ec269d5b0d2bcb7c
font_01_sfnt_off00009172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9172 18300 bytes
SHA-256: 2c5f7f061b9e4a069dac2990bcae09d921c4ae72306c7eb342b614cfeb0e9701

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