Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b686e1cc5f1080…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 06:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc6aa28b391a55df491a84a892ce60b2 SHA-1: 06c2285aebdd28cc11e7561c43be027d3f7b1ce5 SHA-256: 25b686e1cc5f1080591b31449e72e4b92ad3dc9f0beed9704d361a694d0c1220
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded URLs and a visual lure suggesting a download. The ML classifier also flagged this PDF as malicious. The presence of multiple links related to game hacks and cheats, combined with the ML detection, indicates a high likelihood of a phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/479516143/free-online-minecraft-server-game-hack In PDF document text
    • http://stpc.it/images/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/hack-avatar_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/coin-master-free-spins-that-really_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
stream_003_off00004b89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B89 24336 bytes
SHA-256: b6658e012de924fdae99564884d64fcc5fcb4af79f44d7a1958391230441fcd2
font_01_sfnt_off0000835e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835E 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 17756 bytes
SHA-256: 14377ac3d18db81ff7447bb693ccee55c7f80471e2aeaf98ca779f1b2357c71e