Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c2e61c06d0cc0e…

MALICIOUS

PDF

53.5 KB Created: 2021-06-03 07:33:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1c60c6ddcaf3275cd0a152f3e7cdf725 SHA-1: d4e81c00e406fb34742936564a226616ab3cc9d3 SHA-256: f5c2e61c06d0cc0e37c596aad9e231e361ceb669af870c0fdab252ba241fb78c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. The embedded URL is a known malicious redirector, likely intended to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9577

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/link-for-free-spins-on-coin-master-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005408.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5408 27208 bytes
SHA-256: 35e48fc043658bdc1047f48c48795b97ade8603d0be9492c33a6a3f8914604bb
font_01_sfnt_off00009235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9235 3204 bytes
SHA-256: b7fe42cb1da39e96c756399b3532633df029c1fbb3443b9e17d98df25c90dc65
font_02_sfnt_off00009d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D34 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_03_sfnt_off0000af4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4D 18056 bytes
SHA-256: 722d781e478cd0d1a4785e673d05427d87221dd2f44d1d4595ffa323240eece4

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