Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ae568177fc56a8…

MALICIOUS

PDF

34.0 KB Created: 2021-07-20 12:52:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e0684c9d73d2efa2973a101bbef7a9b1 SHA-1: cce0464ce0d195c9c45979fac55646686d0157e9 SHA-256: c8ae568177fc56a8ea4f3c5725d80e1b594228bb70674196c89bed1010eaf6ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The heuristic firings indicate that these links lead to known malicious redirectors and are designed as a lure. The document body text and embedded URLs reinforce this lure by mentioning free Robux and game hacks, aiming to trick users into clicking the malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.tw/app/431946152/how-to-get-free-robux-2021-no-human-verification-game-hack In PDF document text
    • http://artecaseariapolicoro.it/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://artecaseariapolicoro.it/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://artecaseariapolicoro.it/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://artecaseariapolicoro.it/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://artecaseariapolicoro.it/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://artecaseariapolicoro.it/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://artecaseariapolicoro.it/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://artecaseariapolicoro.it/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://artecaseariapolicoro.it/images/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://artecaseariapolicoro.it/images/how-to-hack-roblox-for-robux_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_off00002c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7D 22588 bytes
SHA-256: bdead41cf8afb37a986ca4224700c8b89de8b3f4ba458faad716b6cdc3870a14
font_01_sfnt_off00005ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED6 19612 bytes
SHA-256: 54ebe35a97e5c18431d6c6e5b4deed42a4ccc67a7ee7c9e38a95be4cecadf5db

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