Malicious PDF — malware analysis report

Static analysis result for SHA-256 573265811572fdee…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 11:28:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 12e29c5c20d6cf2f6de83528811b1fec SHA-1: 5c04341c1bdd4f225977abd0b9c6168ac8bcea3f SHA-256: 573265811572fdeec7cf92e692cb20ae33340d63d0eaa918ae2b87b318743a1b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to trick users into clicking malicious links, disguised as a game hack generator. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or exploits. No scripts were extracted, but the PDF structure and embedded links indicate a social engineering attempt to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/431946152/robuxmatchcon-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-python_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-minecoins-in-minecraft_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D9 25192 bytes
SHA-256: 0e05f053eae1d9aec2f487aa9e4c2b01767aef55890b03cbc20318f686cbc636
font_01_sfnt_off0000883f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883F 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_02_sfnt_off0000987c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x987C 18608 bytes
SHA-256: 1772f30b32917b5488ab36612215aea49128e39afdb0bc668ac2eaf3111ec9c9

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