Malicious PDF — malware analysis report

Static analysis result for SHA-256 87242dd4e596dee8…

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 00:32:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 544b203469718edec02bf491f86822d9 SHA-1: 04269b6f6fbbfd1be364d1a6014e42af6cf5e7c0 SHA-256: 87242dd4e596dee8cba5edc768e0b80c0a3cf350d774d26d2b584a81cb2a0661
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" as a lure. The ML classifier strongly flagged this PDF as malicious. The embedded links are designed to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-roblox-promo-codes-game-hack In PDF document text
    • http://christiansymbolkits.com/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-get-free-robux-generator_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F6 27976 bytes
SHA-256: 2b7ba766f2281e7ed820c6cc69a4b457b9804c08a4200ec00c5921ffc9533b64
font_01_sfnt_off00008827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8827 18676 bytes
SHA-256: 9297a3cb5fba7ca587652f513aa1222127deb04773b45a9c0f6482a9c793d56f

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