Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a856fe323c7c77…

MALICIOUS

PDF

46.1 KB Created: 2021-05-19 05:41:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 50cc712c3ad2f3ff121cab683e25c02e SHA-1: be4b6a9f99b72aeef2ad5207c0891bbcf4ec07f9 SHA-256: 54a856fe323c7c7718ec44f0f036231b1dd336baf6944022a605fd228971863c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on offers for free game currency or hacks. These links redirect to malicious infrastructure, specifically `https://netcdn.xyz/app/431946152/get-free-roblox-game-hack`, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this lure, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/431946152/get-free-roblox-game-hack In PDF document text
    • http://maestriadental.com/images/i-need-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://maestriadental.com/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AA 26708 bytes
SHA-256: a8fd9569e18b60019cda5c1316cae62d1b5e2775c64b43b851bd66d5ce2ba0e3
font_01_sfnt_off0000851d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x851D 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000922e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922E 18052 bytes
SHA-256: 3163a373a79a6ba2b402f3bc3abf4e04b0a5713e8f73e060e65042d4a11df7ac

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