Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23e358650657e16…

MALICIOUS

PDF

46.1 KB Created: 2021-05-14 23:10:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3977d4d1c441486308625b8d0472fb8a SHA-1: 38337de2b466857d43d85e0c63694348c7be2fa9 SHA-256: a23e358650657e16a4f62c6c4c6ebb42f553c8bd2acd39bf1d807a1435f46ee7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "free generators" for popular mobile games. The document body, though partially corrupted, contains references to these lures and embedded URLs. The presence of a download button lure further supports the malicious intent of directing users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-latest-mod-apk-free-download-game-hack In PDF document text
    • http://webstan.be/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/robux-converter_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/hacks-for-roblox-jailbreak_GM431946152.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
font_00_sfnt_off0000495c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x495C 29416 bytes
SHA-256: 07b949065b4c3567a5eda0cadbf04e7fb2294888f599904b4a1255ee3effb97c
font_01_sfnt_off000086a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A3 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off0000908d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908D 18636 bytes
SHA-256: e64e7c68c640d7a76083afd8b9b2f812e6e5e3722298a9911c500c059d2c6a5e

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