Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f5d887bdb51c7e…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 17:53:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f507ca55b5a625949ad7436396cf4c76 SHA-1: a4affae8e9abd09517c0d259392594abdb99c813 SHA-256: 65f5d887bdb51c7ef901695d273f1794c9708ad5da2672d32ee43b43d5a61a4c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to click these links, which likely leads to further malicious content or downloads.

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/coin-master-hack-game-game-hack In PDF document text
    • http://gestibrok.com/images/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/kachifpro_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C84 24148 bytes
SHA-256: 8e49a47465decf0736889653415e94900deec8a44caea752fffbcd9a43087e95
font_01_sfnt_off00008297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8297 17976 bytes
SHA-256: a10cba9c8785de960fed0da4a3eab1918984567c97134b904b56a350c269fc22

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