Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9da4af2c89014dc…

MALICIOUS

PDF

43.5 KB Created: 2021-06-08 18:10:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9b3d1886bba00a16d8c43c48e84dd13d SHA-1: 092a352033e1806a9dfe89c0b6cf7cefac01b735 SHA-256: d9da4af2c89014dc2f7846e3aa3dbfbe31cb266d7ce2619a01e00dfa2f2f1e65
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 0.9865

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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-2021-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/tiktok-free-view-editor_GM835599320.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/tiktok-free-website_GM835599320.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-pet-treats-coin-master_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
font_00_sfnt_off00004f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3C 24112 bytes
SHA-256: 2cf9ac70cd66890d01c011ec787f328bd4d7d945afb8dc593d9d9c37e647a7dd
font_01_sfnt_off00008607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8607 18684 bytes
SHA-256: 662354714a7c4aa127b8bd681013e9d5d113fbfc5a2f5afb2d34764175bb04a5

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