Malicious PDF — malware analysis report

Static analysis result for SHA-256 180651cfc05080fc…

MALICIOUS

PDF

49.5 KB Created: 2021-06-09 06:14:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a98e4fd20e176b57daf8787ccf23aeab SHA-1: 16ce81338637c8ad1a4b29cae9f934695d50391b SHA-256: 180651cfc05080fce598efc0b5e96f0831ef8d33e46f8305be15d0af04318ee1
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/free-robux-2021-generator-game-hack PDF link annotation
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-funds-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/tiktok-free-wallpapers_GM835599320.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.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_off0000540b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x540B 25908 bytes
SHA-256: 1748f4a24861868d2a9d75930cc25b67bd877d1d4e5ce4f65437655513591d21
font_01_sfnt_off000090ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CA 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D72 18748 bytes
SHA-256: c43f596d4f107eb8f1f849b4de490d9a92933155ac8f94aa0ebdcc9071b08d0e

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