Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc1c6667576a194…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 06:10:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-30
MD5: 843a635a34e800e34c6781d65fd71e64 SHA-1: afcd8390697b80c855257db7eab7fa55d8e2f652 SHA-256: 1dc1c6667576a194c8425233c44e2615ce6e04656944654fd972d5e383da925a
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-stuff-links-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spin-sites-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_off0000453b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x453B 24288 bytes
SHA-256: 02591076df69bdce6f30be7974d0b8247f05ea2aac2a7ad082f3fcefeebeaa11
font_01_sfnt_off00007d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D21 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000870b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870B 18020 bytes
SHA-256: 4a31ce4ad0cb96257d099b2c128198fdf2dff202f4a157870e4b630be465ac9f

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