Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8d68ca730d49e9…

MALICIOUS

PDF

42.0 KB Created: 2021-05-19 02:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6cb56365e890bc86b6b228ba1651e3e2 SHA-1: 020d1bb57e4c9010782a376eb208e27b7f18a7a9 SHA-256: cf8d68ca730d49e9d7419e7ba1fb80addddd41746faa121b7f06d6067e699f48
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/master-coin-free-link-game-hack PDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfPDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/pokemon-go-free-trades_GM1094591345.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/tiktok-free-2021-followers_GM835599320.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/pokemon-go-free-online_GM1094591345.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/pokemon-go-free-download-play-store_GM1094591345.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-codes-generator-no-verification_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_off00004a4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4B 25820 bytes
SHA-256: b3a2ab26a6f16c02e171a01e10f526c0aeb95fdcd895e30b26e139a30be3dfa6
font_01_sfnt_off000082df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 17880 bytes
SHA-256: f325bc51a5f33ec2ea6c889aa635c0e4104002a1859551a05fb0fcec2a10294b

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