Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcaa8439521677b…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 18:28:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f6a3f0d5c2d079abaae994288f5e355f SHA-1: ea25c35f6faa7da3831b8af250d710f14fd63f0a SHA-256: fdcaa8439521677b466f1710be0a955af81e29c4f40a11793ca02f3f3562d24f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with 'free game hacks' or generators. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest the document is designed to redirect users to malicious sites, likely for malware download or credential harvesting. The authoring application 'wkhtmltopdf' is noted but does not directly indicate the malware's specific family.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/free-minecraft-survival-server-game-hack PDF link annotation
    • https://katalog.smkn1glagah.sch.id//repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/2021-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/robux-free-c_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005273.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5273 24348 bytes
SHA-256: ddb047d6c54a2fa47e87de3f35cdda7e6de74c1bd083a2cb7e42f31016c78840
font_01_sfnt_off00008a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2A 2956 bytes
SHA-256: b1c0f35e2a6d7349f277ebf0ee2543b1fd8fe868e47dd4ca2d63591cf2bf00f9
font_02_sfnt_off0000945e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945E 17896 bytes
SHA-256: a416ee995e2fcdad104e8f08570a8c057a7877f0093c65a8eab662d227b30cb8

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