Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd86eea51c4ec7c0…

MALICIOUS

PDF

34.0 KB Created: 2021-07-07 05:51:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 84da1734b3655471f459af6fc824e97f SHA-1: c928caef8e35c7b5a1d5f177a905c6c180634e53 SHA-256: dd86eea51c4ec7c00817abc1c130f41ede8725caee9e16955f8cb36723242e2d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs and a high-confidence heuristic indicating it's a lure for game hacks or generators. The primary URL, http://netcdn.tw/app/406889139/free-spin-and-coin-game-hack, likely leads to a malicious site or download. While no scripts were explicitly extracted, the nature of the lure and the embedded URLs suggest an attempt to trick the user into downloading or executing a second-stage payload, potentially exploiting client execution vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spin-and-coin-game-hack PDF link annotation
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/hacking-of-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/working-robux-pastebin-hack_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021-may_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/counter-blox-roblox-offensive-hacks-2021-slurp_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/pubg-uc-20_GM1330123889.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://elearningmin3mojokerto.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-scripts_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_002_off00003171.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3171 22160 bytes
SHA-256: 5fb640cd4810041ea123d6021f62e0e9d905b9ef0c2e7710e751450cfb05bc5e
font_01_sfnt_off00006285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 18244 bytes
SHA-256: 1760058a9b4ac65e75107fdb05ced4e329212cd08f375451f5a371d24b39a496

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