Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e81c8185fc9d8c…

MALICIOUS

PDF

36.4 KB Created: 2021-06-26 08:59:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 55e7cd5f28c28f1cdb9d1d29169f2c98 SHA-1: bd75a0980e915be1b9fe48e286d5cf0096c9b26f SHA-256: 54e81c8185fc9d8cc19504831ec010b142bdc8d95f71fb337c1fb3ddc5cd4e7d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically designed to lure users with game-related cheats and hacks. The document body and embedded URLs strongly suggest a social engineering tactic to drive users to potentially malicious content or downloads. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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.co/app/431946152/how-to-hack-in-roblox-jailbreak-2021-game-hack In PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/csgo-wall-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/robux-hack-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/roblox-mad-city-cheat-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/how-to-get-free-roblox-animations-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/roblox-free-3d-online-gmaes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/free-robux-legally_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/robux-miner-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/roblox-vip-cheats_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/classic-builders-club-roblox-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/etok3-crab-roghoul-alpha-roblox-cheat-code_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/free-catalog-items-roblox-2021-december_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/roblox-account-hacked-and-pin-set_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/roblox-vehicle-sim-money-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/como-hackear-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1magetan.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_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
font_00_sfnt_off000033ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33EA 22984 bytes
SHA-256: 6f51d72a9990c89185ba3e84ce436f1b529dd3fb185b791832b579caa7cbb060
font_01_sfnt_off000067c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C8 19508 bytes
SHA-256: b6362aee35096f3f8cf4f5e38a322df9f8eb281f5f2041f877a768febb64d751

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