Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb0203e1b2ae24f…

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 13:47:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cb1f1f0b7d9404eacef78734a899ab34 SHA-1: a087d387d4e060ed0b7c98dee54029c191a58e21 SHA-256: 1cb0203e1b2ae24fccac68df6e21cdadfb3cc1522dbe8c920cc54f60a13a1291
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded URLs that redirect to a "game hack" generator, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and heuristic rules confirm the presence of malicious redirector links. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest it's designed to trick users into visiting malicious sites, likely for credential harvesting or to download further malicious payloads.

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/406889139/coin-master-free-coins-and-spins-daily-summary-game-hack In PDF document text
    • http://per-bittner.de/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/wurst-client_GM479516143.pdfIn PDF document text
    • http://per-bittner.de/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/free-robux_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://per-bittner.de/images/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/moon-active-games_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://per-bittner.de/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://per-bittner.de/images/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off00004958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4958 23728 bytes
SHA-256: 0f32923ecde9ca38f7c4efb305f098b54df6cc40a40f205ab029bb87f0b4cfc3
font_01_sfnt_off00007f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F11 18880 bytes
SHA-256: 80e94ef00212ac5fe4220c165773dd6e8ea516dcb328b8ee80116dae5b806def

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