Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa98aaf730882900…

MALICIOUS

PDF

41.9 KB Created: 2021-05-14 13:05:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4926a5e81c7f867ecda5f6726d87c33b SHA-1: 723344b9c71a289e3491d585ca883d5c8d4c6fe2 SHA-256: fa98aaf7308829002483bd1ff056c1395c0b4be918d03dd65568f4e3cf9acbaa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators' to lure victims. The ML classifier strongly indicated maliciousness, and the presence of redirector links suggests an attempt to deliver a second-stage payload or lead users to phishing sites. No scripts were extracted, but the document's structure and embedded links are indicative of a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-free-coins-and-spins-link-game-hack In PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/free-robux-master_GM431946152.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://elearningma.darmuj.sch.id/__statics/gudangsoal/files/village-3-coin-master_GM406889139.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_003_off00004a3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3E 24220 bytes
SHA-256: 087ff6cf6e2d169222ed0151958793c4ddfa54a5b42ac0a811652b000297b595
font_01_sfnt_off0000819b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819B 18228 bytes
SHA-256: b9853edf503a53d442d3b577c09c09d59d7c57f52c57bf669c9991918f7be207

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