Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55cf094c96dcb38…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 14:57:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3f789a3357d074a0be64bcdb48132d61 SHA-1: 417b9ebc97d46452dd0c7c70199e8e4d172a1d20 SHA-256: d55cf094c96dcb389fb16e7788a761596fb690e1d3f8541ddfb87c9455fefe6d
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 0.9980

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-coin-master-spins-for-today-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7/repository/roblox-pokemon-games-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-a-dominus-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/play-games-for-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-gift-card-codes-unused_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-configuration-database-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-jailbreak-dll-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-deadzone-remade-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-in-ios_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/programa-para-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-umbrella-on-camping-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/youtube-roblox-hacks-for-rubox-com_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-without-a-password_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/easiest-coin-master-hack_GM406889139.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_off0000335c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335C 23092 bytes
SHA-256: 2771e30fe2144f2b2b983e88d9d6d78d7c867bd206dce5a0785d35b4869eaddf
font_01_sfnt_off00006788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6788 18528 bytes
SHA-256: 7516c489b1b881653228620cc2b0dc971f4c0cc04e000053424a555de8493b8f

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