Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ecacdc56453f903…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 00:02:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2b1bcf963610ed4fdb98f37a4a6be926 SHA-1: 9d0de0f5ffd8d53416bb705d048f62fe15a29836 SHA-256: 8ecacdc56453f9037056e4fb01aed651b93776c902eda5fb4160c058c34efbb7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely leading to a second-stage download or further phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/coinmasterfree-game-hack In PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/www-robux-us_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-coins-and-spins-link-for-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004888.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4888 24972 bytes
SHA-256: 3bf7548ff6a89a3889093a27aa1ef7d7799a5e8db8e2ac3fb944b1dc6efef12f
font_01_sfnt_off00007fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDE 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000089c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C9 17808 bytes
SHA-256: ed5fdd5441acd06a3bb02758ac945137dbfa7be696a0962169bf0eb95ec74bb8

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