Malicious PDF — malware analysis report

Static analysis result for SHA-256 669818af6627ef54…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 06:51:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 60794cff115b65fef1a1c20f41a47f75 SHA-1: d8577679812452770e15ab76db545aa03b23b9dc SHA-256: 669818af6627ef54137b8cd1c207453c54bdd789a024576a8dab1cbd1734cce3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and free currency generators. The document body and embedded links strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-spins-on-coin-master-game-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/promo-code-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_004_off00004e55.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E55 25256 bytes
SHA-256: 7f9a1babb0a2c61cbf24e7e84bed418cc3f4f31e4a4b8c9ac2ed3f2406ba1b87
font_01_sfnt_off000086e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E2 18148 bytes
SHA-256: b1f30c98449655e0c119849c00bf29bb9bd656252beb56b2567f3adea4b6d957

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