Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d88db68d78a7d3…

MALICIOUS

PDF

46.7 KB Created: 2021-05-15 02:13:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9e62dd7ef63062fb86fe303f75d20a0a SHA-1: 8fef0b9a89d36f66837fdc8fe650f5fe3e9a10ed SHA-256: c8d88db68d78a7d3a16c202b8f5eaf3f54556bf958ba27e9e6957b8ef91eee0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and the presence of numerous external links strongly suggest malicious intent. The document's content, disguised as a hack for a popular game, is a common lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate a potential for JavaScript execution or redirection to malicious sites for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/roblox-april-fools-hack-game-hack In PDF document text
    • http://nevesomost.by/images/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://nevesomost.by/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://nevesomost.by/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://nevesomost.by/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/coin-master-gold-cards-free_GM406889139.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
font_00_sfnt_off000048e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E8 26492 bytes
SHA-256: ad15f4647e8a11ef45fb366700f21b02dc1ef39188b6dc1ccbfdb21b151180f1
font_01_sfnt_off000085e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E4 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000092f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F6 18640 bytes
SHA-256: 410f22dfa3a1d00d561499a0339a6a41be2e954e3f9c73b2d892c6afca972cb0

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