Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd57041b284865b…

MALICIOUS

PDF

36.7 KB Created: 2021-06-22 03:12:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f71ab40d632d442c3b4c815f31d8d673 SHA-1: a712a66e3c83d0e61b2a177b4c49a017bb3b78da SHA-256: fcd57041b284865b80e41516a4b12e17eea17c6e7540744292ae4b4c4a282ceb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures for popular games. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were extracted, the PDF structure itself facilitates these malicious redirects.

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-free-robux-by-playing-meep-city-game-hack In PDF document text
    • https://www.armera.co.uk/uploads/files/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-ad_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-roblox-golden-wings_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-free-1m-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/real-free-robux-obby_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/cute-free-roblox-outfits_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/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-no-human-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_off00003598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3598 22756 bytes
SHA-256: 83ec4c2c37afb2d7dd31e627aaf4df69b55d644e617aa06bab4f545fedf62502
font_01_sfnt_off00006834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6834 19884 bytes
SHA-256: 339e01d44f969ad91ebadce20ef2a4d8a0e999eeb9e55172507794ea18309d61

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