Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2052ca30bba6468…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 15:11:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b45fe847e0e8daa7077c3af96cbc6235 SHA-1: c35e5409acecc9adb2b26f81eda11a942f238134 SHA-256: b2052ca30bba6468cab229da4c09027c584c4863765310951cbfcc5ef3b045d5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and generators. The document body and embedded links suggest a lure to trick users into visiting these sites, likely to download further malware or engage in phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-roblox-hack-game-hack In PDF document text
    • http://katalog.gemalibrary.net/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-free-memverships_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/pokemon-go-free-app-download_GM1094591345.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-website_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-esy_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-use-redeemed-cards-on-roblox-no-hacks-2021_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
font_00_sfnt_off00003037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3037 21500 bytes
SHA-256: 2114b7f46e7fe1308d2a7c05c48c3d4026251cb0da66ea7516a38ac294b0355a
font_01_sfnt_off00005f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 18820 bytes
SHA-256: cf67562a6930539490549aeb8f0b318a0b45b3e5cb7414ef3283f960707338b6

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