Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1d1f60f9efba24…

MALICIOUS

PDF

42.8 KB Created: 2021-05-17 01:41:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb5f5ac77eb49c96f3dd3f31520c4244 SHA-1: 44ce73c96800c6b9fb6f1bf698eba81f07b0e61a SHA-256: af1d1f60f9efba2427b7ef60a88bd90dc71872908bdc0ffedd45a7f8857e19f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites promoting 'free Robux' or 'game hacks', a common lure for phishing or malware. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate this malicious intent. Although no scripts were explicitly extracted, the document structure and embedded links suggest it's designed to drive users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/can-i-get-robux-for-free-game-hack In PDF document text
    • http://pro-graphite.com/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://pro-graphite.com/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://pro-graphite.com/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://pro-graphite.com/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://pro-graphite.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pro-graphite.com/images/level-coin_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://pro-graphite.com/images/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://pro-graphite.com/images/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://pro-graphite.com/images/get-free-spins-on-coin-master_GM406889139.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
stream_003_off00004b41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B41 25024 bytes
SHA-256: e5f26b18d92dbeb44e6601af1beebc6c35ba481b1c1fe75506cb6c98f4a7bf30
font_01_sfnt_off00008492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8492 18344 bytes
SHA-256: 56a64ad9af2fab004080c55c49ec35472f3c2134e95e40197be892b268dd39d5

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