Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c57b2a95558893f…

MALICIOUS

PDF

44.2 KB Created: 2021-05-10 19:08:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9ba5577a3326ff1a17e7c9cf92bc3c5e SHA-1: 55c346441c625ab18c0fc7cd8f4272897be020eb SHA-256: 4c57b2a95558893fc5d067561c856c1597a44f81901b69081c31189db4adcd10
82 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 0.9976

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.xyz/app/406889139/how-many-levels-are-in-coin-master-game-hack PDF link annotation
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-robux-with-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_off00004cc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CC6 27408 bytes
SHA-256: 334727984915514b5c87977219135249bbbb01668b8d89efed60f0c88da37e94
font_01_sfnt_off00008afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFC 18076 bytes
SHA-256: 54e54f6e61ae990098bb4cdf24a44bcdd14b606a50495af7ec2cc921364cf956

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