Malicious PDF — malware analysis report

Static analysis result for SHA-256 765869a4368165b8…

MALICIOUS

PDF

35.3 KB Created: 2021-05-24 08:55:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 838625d1204e2b4835897bad9191bb01 SHA-1: 7630e3fd263240892a617637c278fcdc3a0299b2 SHA-256: 765869a4368165b80cc6f75a03a0be84ce3566f83ab0f7b3f72a2f843d69b31e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors that are flagged as malicious, specifically promoting 'free generators' and 'game hacks'. The document body includes a call to action to 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', further reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/haktuts-coin-master-free-spin-link-game-hack In PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/win-free-robux_GM431946152.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_off00003090.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3090 24840 bytes
SHA-256: ca6cfc99e45bc2b75f1bca17fd17d3bf421e73ff2a2774724d7b9b0830b8dce8
font_01_sfnt_off000068db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DB 18196 bytes
SHA-256: d21f7c9777ff22c572caba6bc61bff535e054503ba9d308437b2513133ac2854

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