Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d97eb9dc97e1173…

MALICIOUS

PDF

43.1 KB Created: 2021-05-11 14:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 680f3586ce5072942a34a5d4ba1462d6 SHA-1: d61f0b61976ceb016c5bb960f117936819dbe11f SHA-256: 4d97eb9dc97e1173fb75a5af0bc34fc049491dc02deaa254463cfda56f6de15d
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 0.9971

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/free-spins-for-coin-master-game-game-hack PDF link annotation
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/spin-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-promo-code_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_003_off00004cf3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CF3 25296 bytes
SHA-256: 2d7baca230587054c92ed23e9bbb61ee721ed5ea531f7701ab0e7ce0f7e3b24c
font_01_sfnt_off000086ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AC 18148 bytes
SHA-256: 3d9eadf91671033e4331a310c0b0805123b3ad5df85bc8ef5d318b7854ffa5cb

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