Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea5d7829dfe9a7a…

MALICIOUS

PDF

39.2 KB Created: 2021-05-22 02:45:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b18afa586f1948a08ca718547a408e11 SHA-1: 0085aa43ce724bd2f7290172fa434a2d3a13d947 SHA-256: 3ea5d7829dfe9a7a7b6aa8203ed31ba764e7d2ebb33420baf57d6c23166bbb81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks'. The primary malicious URL identified is https://netcdn.xyz/app/835599320/free-tiktok-comments-game-hack, which is flagged as a malicious redirector. The presence of a download button lure and the ML classifier further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/835599320/free-tiktok-comments-game-hack In PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/pubg-uc-kr_GM1330123889.pdfIn PDF document text
    • https://elearning.manbondowoso.sch.id/__statics/gudangsoal/files/orewards-com-free-robux_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
stream_002_off00003011.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3011 27912 bytes
SHA-256: 72057de30c7efe07a1a9431c9d54cd6100157d6a8d2ae8ec059336fd876223af
font_01_sfnt_off00006f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6D 2892 bytes
SHA-256: 5e0712ca08337fb3b2e5736ec787a8b2ab1b9b6f3706f0b029d23afe08e6a7a6
font_02_sfnt_off00007953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 17716 bytes
SHA-256: be925199a27c2d273bbfb828ef38ce2fcf452edcc9d534dc6164d07d4183a457

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