Malicious PDF — malware analysis report

Static analysis result for SHA-256 2787e312e7770f5f…

MALICIOUS

PDF

35.6 KB Created: 2021-06-22 11:20:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b24f162d08ca5d111909c26340d8044e SHA-1: 63fe521220c6b5a28447c8f25c26a337f98e189f SHA-256: 2787e312e7770f5fa6cfef63bd2dea53b3eced702ab37117ce20f4629390cc45
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector service, which is flagged as malicious. The document body and embedded URLs suggest a lure for free game items, likely to trick users into visiting malicious sites. No scripts were extracted, but the presence of embedded URLs and the malicious redirector indicate a phishing or scam attempt.

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-obby-no-password-game-hack In PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-can-you-hack-get-coins-in-roblox-knife-capsuls_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-tracker_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-hack-on-roblox-rap-battles-2021_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-cheat-money-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-catalog-roblox-java-script_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/real-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_off00003421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3421 22200 bytes
SHA-256: a3de6097d82cf3dfa2a421c8e74988a60386df4d7c816d3df2ac350f97cbe85b
font_01_sfnt_off0000654c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654C 19388 bytes
SHA-256: 3fd379c9aadff1a3b0fe239670f6c262b82a5c230882d1cbeb010e4c6d2da883

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