Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7acc2ccc8db49db…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 08:37:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8746df3ec82de2ed81c2992b9f4a777a SHA-1: 77f79f0dcac03eeb084903f3d5a61347a09bb9d6 SHA-256: c7acc2ccc8db49dbc3edbca1e90cbffe2bf9d82a7f58fee83f7ab534dd16c819
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The primary link, https://netcdn.xyz/app/431946152/how-to-hack-a-roblox-account-2021-game-hack, is identified as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs and text suggesting a social engineering pretext to drive user interaction with these malicious links. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/431946152/how-to-hack-a-roblox-account-2021-game-hack In PDF document text
    • http://ambingenieria.com/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/www-coin-master_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/robux-sites_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-get-free-robux-no-survey_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_003_off0000494b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494B 24028 bytes
SHA-256: 608a6d33f0fe4ebf481bd830b68e89905f43abd2b97d424c9b32f0327912f115
font_01_sfnt_off00007fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEF 18992 bytes
SHA-256: aeef6a7714c6357f73dd4bac3524810632f54ab1d1528492d13c90d39421ba58

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