Malicious PDF — malware analysis report

Static analysis result for SHA-256 9405aa7d1b63af9f…

MALICIOUS

PDF

43.8 KB Created: 2021-06-02 22:16:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2333b9ff18140e9fdf5ceaf6db88e196 SHA-1: a2efe66da11211bf294ca4c062f61435340d330c SHA-256: 9405aa7d1b63af9f8d3c17107aa03df3d7ab48b36e9ebb28135701297e72f731
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and 'game hacks' to lure users. The presence of a visual download button and the ML classifier's high confidence score further support the malicious nature of this document. No scripts were extracted, but the embedded links are the primary mechanism for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/free-robux-no-verification-game-hack In PDF document text
    • https://www.ergolight.at/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://www.ergolight.at/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.ergolight.at/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/rbx-earn_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ergolight.at/images/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://www.ergolight.at/images/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://www.ergolight.at/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://www.ergolight.at/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ergolight.at/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.ergolight.at/images/rbx-robux_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.ergolight.at/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ergolight.at/images/how-to-hack-to-get-robux_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_004_off00004dfc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DFC 25076 bytes
SHA-256: 21b8bd3be9217aac38e8f201491f7c908379a47753911f4ed6e411560792e2c7
font_01_sfnt_off0000879b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 18600 bytes
SHA-256: 361892a278de990f6dfe9fe9f512a0ec39aeba1740037781b92f32c6ad2b5051