Malicious PDF — malware analysis report

Static analysis result for SHA-256 e622d968be13d8cc…

MALICIOUS

PDF

49.1 KB Created: 2021-06-09 08:53:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7e0fe68d933e86ae190e80d5c26e3442 SHA-1: 1288afebff22102aed7c65fecc83018fd4f41241 SHA-256: e622d968be13d8cc450a83c17556a9e6c4fdb66fa1e38b6c9b3d43fdc57f8cb7
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 0.9796

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.tw/app/431946152/how-to-get-free-robux-in-roblox-easy-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-gg-roblox-quiz_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/como-hackear-roblox-apk-mediafire-para-ir-mas-rapido_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E4 27360 bytes
SHA-256: da563cda3c533402a1bf1482d2e57b89137634037a79a521170527773bc0abac
font_01_sfnt_off00008efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFD 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA5 18764 bytes
SHA-256: 7ff27ed387836510440dcaa391fdb15f520eb1c309bd50521e155d65eed24dc0

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