Malicious PDF — malware analysis report

Static analysis result for SHA-256 25478738c1a81f4c…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 11:25:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7c4104f70b1cb77e09f9aa4af95a3c9d SHA-1: e17e8a8e07845fdb93f786532be82f5597dce481 SHA-256: 25478738c1a81f4cbb0ffc94750750baf02e812dace9bcb272d3d970e34bc432
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for 'free Robux' and 'free spins', directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a phishing or scam attempt. The document's content and embedded URLs suggest it is designed to trick users into visiting a site that likely hosts further malware or attempts to steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/free-robux-codes-no-human-verification-game-hack In PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/roblox-2021-cheat-engine_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/fashion-frenzy-roblox-play-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/roblox-launcher-hack_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-robux-generator-tool-paste_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/roblox-prison-life-free-game-pass_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/how-to-get-any-item-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://elearning.minkotablitar.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.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
stream_002_off000031b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B5 23200 bytes
SHA-256: bf57d171b680509b1ba28d50a013c594662fce477abf5808d4562364c9f3563d
font_01_sfnt_off0000660b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660B 19508 bytes
SHA-256: 2dfde449b123a820f71ecd143a07ff41e89d4c72f15aa4e6fc945965a2c79889

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