Malicious PDF — malware analysis report

Static analysis result for SHA-256 825addab7b0cc6be…

MALICIOUS

PDF

31.8 KB Created: 2021-07-21 00:34:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e39c48cc4c7e36bb6c9b1f901c83acbc SHA-1: 7b5c8a14c7562deb884dbf29f533ab61a59ce908 SHA-256: 825addab7b0cc6bed02279c08d3f5c64a9704b03423b5c220b76d9aea7e61a37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The document body and embedded links promote topics like free Robux, game hacks, and Coin Master spins, aiming to trick users into clicking through to potentially harmful sites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/479516143/how-to-play-minecraft-for-free-game-hack In PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA0 21772 bytes
SHA-256: eca1dff0d204ff5c0905e7055e780139952b6958b3f60dffe7f6b52165c14230
font_01_sfnt_off00005a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A56 18284 bytes
SHA-256: 30e565cae926cf2505d0f64cbbb860d09a66a84df24e80d913481d9233f56de2

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