Malicious PDF — malware analysis report

Static analysis result for SHA-256 309e7c8c23ad209a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 22:38:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bfb3443c864319b9d79377e915cef30f SHA-1: a7b8a74cf9fb8acf52e6409ecdac2dbc66822a97 SHA-256: 309e7c8c23ad209a8fdffbd9bdc92ca8b56280f914c4db2791cc148ab8b5eb80
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free items, directing users to malicious redirector URLs. The document body contains obfuscated text and multiple URLs that are likely part of a phishing or malware distribution chain. No scripts were extracted, but the presence of numerous malicious links indicates a high likelihood of further malicious activity upon user interaction.

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-pc-game-free-download-game-hack In PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-coins-and-spins-in-coin-master_GM406889139.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_003_off000049d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D4 25056 bytes
SHA-256: a75a812dc1f7072b2fa36cd35efa5d54b73a5d3d1e8d01bbff2608c0730ed34c
font_01_sfnt_off00008237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 18704 bytes
SHA-256: 8ce66c65e478767476711e8a187d609ec807e2903d8f7500c3ed78d36e0717ab

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