Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95639cf836b22ee…

MALICIOUS

PDF

41.5 KB Created: 2021-05-13 02:00:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 55e3732f1a83e070885bb0301dc7084a SHA-1: 29ee773c954bb164dd9b712c10dc89bdafe2a283 SHA-256: c95639cf836b22eecdc9ae94d5a90daddd673d48343720e5b6fe2d364cb34bdb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and generators. The document body and embedded URLs strongly suggest a lure for users to visit potentially harmful websites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/406889139/free-coin-master-hacks-no-verification-game-hack In PDF document text
    • http://altc.de/images/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://altc.de/images/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://altc.de/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://altc.de/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://altc.de/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://altc.de/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://altc.de/images/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://altc.de/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://altc.de/images/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://altc.de/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://altc.de/images/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://altc.de/images/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://altc.de/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://altc.de/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://altc.de/images/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://altc.de/images/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://altc.de/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://altc.de/images/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://altc.de/images/free-robux-with-no-human-verification_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
stream_003_off0000488c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488C 24560 bytes
SHA-256: 4e19acc5c8b878a5fadf10bd9917557201456ded73184effac29c72fefcb0347
font_01_sfnt_off000080d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D8 18016 bytes
SHA-256: 22df04c4dacbc852f4ecaf83adb1826ed6293343c5161e377e09b669fc2092ee

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