Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09a1987d0b8e397…

MALICIOUS

PDF

50.6 KB Created: 2021-05-15 00:56:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f06a69f557f2e3ead5200dda2c2fe089 SHA-1: e4aac317d76fe9dcb8fcf9591b3e96ceb59970ae SHA-256: b09a1987d0b8e397821a712c83bbda527b3fc06e6b18473e7b71c10098fd6a1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and sites offering 'free generators' or 'game hacks', indicating a social engineering lure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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-spins-on-coin-master-iphone-game-hack In PDF document text
    • http://gestibrok.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A94 25332 bytes
SHA-256: 07d80d2b236047e1354f70f0f69a4f4198a38a23f860f7fd191a6d3da2841f70
font_01_sfnt_off00008455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8455 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7A 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000a404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA404 18052 bytes
SHA-256: cd0cb577e7d4090b96c5f8ed0188a47ba8a30ae82de00c7511d7ba9195227280

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