Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3230316643cc57…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 07:10:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b141b54b4f0f6d5afa31ef2007c90937 SHA-1: fb8da093b8304ae7eab64fd52a5144f3bfa470fb SHA-256: 3a3230316643cc57c6fff45e38eb61949045df997b1903a4af79e618622c2c60
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/coin-master-free-link-today-game-hack PDF link annotation
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-codes-june-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/websites-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-roblox-emotes_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-spins-and-coins-blogspot-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
stream_002_off000033dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33DD 22612 bytes
SHA-256: d3be3b161eb528a1c684c332fe42e52c3433390cbfe14c3870fae2ca66e77603
font_01_sfnt_off00006657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6657 18524 bytes
SHA-256: a920f55f025afea5015e120a5f5dfdf37c8d5d267cdc7def099919dbf31b76fa

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