Malicious PDF — malware analysis report

Static analysis result for SHA-256 c716b9b78b4d93be…

MALICIOUS

PDF

46.0 KB Created: 2021-05-19 09:02:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0bdac80ae526125dba6817c672896057 SHA-1: 81fca0bf458629a61907876e205d9e06789278cd SHA-256: c716b9b78b4d93be6770021f032d6e6d2fbec157ec0925cc2f69141e8e2becff
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. The presence of these links suggests the document is designed to lead users to potentially harmful websites, likely for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/free-roblox-accounts-generator-game-hack In PDF document text
    • http://grupodin.com.br/images/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack_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_off0000479b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x479B 26764 bytes
SHA-256: b00c11d8ce7ad29748f84824931854e3c731c9b495407a99b3261972b28d6422
font_01_sfnt_off000083b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B3 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000090c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C5 18420 bytes
SHA-256: 53882506a585ec055cfd1b3dca4ddad0c6693ab294b081b26afef1ed42434664

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