Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbffd970c92c9655…

MALICIOUS

PDF

44.4 KB Created: 2021-05-12 00:11:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5bf6521bc37f13d11250715bacbd9c34 SHA-1: 9ae1cd4a2c4671e052f5b3e1bf4ec47583e5d41b SHA-256: cbffd970c92c965529de19eb1260ae4d8150ceeb407169e854c11eba9f78447c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, identified as a PDF link farm, that redirect to various game hack and free currency websites. The primary lure appears to be related to 'Coin Master' and 'Roblox' cheats. The document's structure and content strongly suggest it is designed to drive traffic to potentially malicious or scam-related sites, leveraging social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.xyz/app/406889139/coin-master-daily-free-coins-link-today-game-hack PDF link annotation
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E64 25916 bytes
SHA-256: 908e432ffca3f9b21ed727930f559bdef9d1befbf3a5547dfcb11aeaeee41de1
font_01_sfnt_off00008aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA2 18476 bytes
SHA-256: 4e997083ece3f599a87e8960a4d85608706b67604b90560f7b4d74d0b586c961

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