Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7bdec7b4fa9453d…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 03:33:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0bd4b9576b60c3a24ba45cee33310dc1 SHA-1: 1a2682308ad0a15835e8d6f595c211a88fc9ab5e SHA-256: c7bdec7b4fa9453d45873a40c8acf4090fd73ec13ee93c18df77bcbed7eb6f26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, directing users to a known malicious redirector. The document body contains multiple URLs, including the primary malicious redirector http://netcdn.co/app/431946152/how-to-get-a-free-2021-roblox-account-game-hack. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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-get-a-free-2021-roblox-account-game-hack In PDF document text
    • https://www.fhccu.com/images/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/how-to-use-free-robux-cheat-codes_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/army-tycoon-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/money-hack-western-frontier-roblox_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/synapse-roblox-hack-download-free_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/how-to-install-roblox-hacks-booga-booga_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/spin-coin_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-giveaway-january-2021-9_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-hack-2021-iphone_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
font_00_sfnt_off00002dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEC 22404 bytes
SHA-256: 208745f9bf8d4167e08459072bffd7edb822d761dddae573aa436f60bc473cde
font_01_sfnt_off00005fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB2 19460 bytes
SHA-256: 6c53d7b154719335a6186fc9a7c4b410c1579227642b56b9a721ba82c3ff0da3

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