Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c34f0a6a6ab58c…

MALICIOUS

PDF

45.7 KB Created: 2021-05-15 00:42:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9be7d822b666f8c42478ab632b748109 SHA-1: af531b60dba23f87d886aae337d94268a6568b2d SHA-256: 37c34f0a6a6ab58c6216937a314be48fcf25de1347b93f80a582c1468bbd5c8e
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 "free Robux" or "game hacks". The primary redirector URL is https://netcdn.xyz/app/431946152/free-robux-giveaway-live-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a lure designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-giveaway-live-game-hack In PDF document text
    • https://gimnaziya6.kz/images/get-free-robux_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-today_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/get-free-lives-on-coin-master_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000440c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x440C 26632 bytes
SHA-256: 6e34d34ebdc1e5308bdfdba33e3bca67a6644285e54f0ae0dac8eab3878107af
font_01_sfnt_off00008197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8197 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3E 18820 bytes
SHA-256: 3db94d24ba3abe2bdb9d310b65f8480e65e9005ffe127367b6d2ef8ae08c9d7b

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