Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dcac50a36920e9…

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 17:54:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2c448b0fd8c6c8733be88e28ce6cb05d SHA-1: 84e6dc4cd9dd3f261742ac29d1f061343cf7bdb1 SHA-256: d0dcac50a36920e92f651a2ff6c697254ba6db63b4fc81e29e90df3ddf27dbea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users to click on links. The primary link, http://netcdn.co/app/431946152/free-robux-2021-youtube-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely leading to further malicious content or malware download. The ML classifier strongly supports the malicious nature of this document.

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/free-robux-2021-youtube-game-hack In PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/hacks-bacon-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/roblox-elemental-battleground-hack_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/giving-people-free-robux_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/thebuxian-get-roblox-ninja-animation-free_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/cheat-engine-roblox-infinite-health_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.samsoncc.com/uploaded_files/userfiles/files/free-avatar-roblox_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_off000031e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E9 22580 bytes
SHA-256: ebfbbe3130889190f70ac50510c714288d75f63163eb6cd016513b65fa28820c
font_01_sfnt_off00006483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 19384 bytes
SHA-256: 7f45d9fb96b29a7a7012a08b36c2af5c35e45941a4d2ce907b2a636e677c7ab4

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