Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b52d3cb53bb729c…

MALICIOUS

PDF

32.2 KB Created: 2021-07-20 05:20:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8c8af47f776a830b792d7be2fe887f72 SHA-1: 730444f7a9ba559fef451fe8a9051ebdfca7df4b SHA-256: 1b52d3cb53bb729ce311eafce3aad4c627a20068f122ea411ee3ad0699b5676c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically advertising "free generator / game hack" services. The heuristic firings confirm these links point to known malicious redirectors and a game hack lure. While no scripts were explicitly extracted, the nature of the embedded links and the PDF format suggests potential for JavaScript exploitation (T1059.007) to facilitate the redirection, likely delivered via spearphishing (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/406889139/free-coin-master-coins-and-spins-game-hack In PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/free-spin-link-for-coin-master-game_GM406889139.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
stream_002_off00002a3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A3D 22544 bytes
SHA-256: 85066b8c882300dbb90084d61ac79ebc4f61d1620ba2af48450e66c75bfa563a
font_01_sfnt_off00005c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C80 18060 bytes
SHA-256: 11bd500b33c169b65e53ecddb4cd7ac7428d9a9bdc32d60ba78f45c9260aee9d

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