Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b806b16783d39cf…

MALICIOUS

PDF

45.4 KB Created: 2021-05-14 13:49:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f53822329713e3d10ffcafe4288f5a27 SHA-1: 14c23c298e2a4917c527ad54c579f2439a183d1d SHA-256: 3b806b16783d39cf068cbdaf438f68db0b8271f7f27f44c56aa3a5620450a110
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack generators, aiming to lure users into downloading further malware. The heuristic firings indicate a malicious redirector link and a lure for game hacks. The document body, though heavily obfuscated, contains references to 'Win Free Robux' and 'game hack', reinforcing the lure. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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/win-free-robux-game-hack In PDF document text
    • http://pesok-rk.ru/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/100-robux_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C8 25756 bytes
SHA-256: 473795f7b7eb0f3533b295cc68ca0cf1123e3af2e2433f8712e7bb07bf0a8ddf
font_01_sfnt_off0000852a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852A 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED9 18332 bytes
SHA-256: abf0b8ed31f5047ebf3c1463738251345f2a3e8ea43e3f17fb5c5b26bb0b5a7e

Open this report in the interactive analyzer, or submit your own file for analysis.