Malicious PDF — malware analysis report

Static analysis result for SHA-256 971cd35228b7bd28…

MALICIOUS

PDF

42.3 KB Created: 2021-05-20 14:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0e5e071be89c534b1f158c93b623fe0a SHA-1: 072fb1582da90aa56dcba60dd48cc25fe55ea0e1 SHA-256: 971cd35228b7bd284bc7ecdc430ad79f642cb5071222e91c58500dedf6e9153d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as offers for free in-game currency or cheats, such as 'Free Robux With No Verification 2021'. These links redirect to malicious infrastructure, specifically the URL https://netcdn.xyz/app/431946152/free-robux-with-no-verification-2021-game-hack, which is flagged as a malicious redirector. The document body also contains other suspicious URLs related to game hacks and cheats, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8090

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/431946152/free-robux-with-no-verification-2021-game-hack In PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-hack-pubg-mobile-unlimited-uc-without-human-verification_GM1330123889.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_off00003567.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3567 26492 bytes
SHA-256: a366640fb343b2e42c5455d297fc551faefd30569352919e27bfc66628549ea6
font_01_sfnt_off0000738a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x738A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000809b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x809B 19368 bytes
SHA-256: aac922b8691acc9aa277dffee065f580c863b50a75d1a5b8a64d6db85e21622d

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