Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bcb41c0b284ca88…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 09:51:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8c36d5badda373890eedc68d81beaf7a SHA-1: 1787a621f72d4f2efd414f2937ac70341f50438f SHA-256: 8bcb41c0b284ca88eaf77084227cbc6e6ff3b0fa3773bc3bb0fcc0c4a0e56752
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.online/app/479516143/minecraft-toys-for-free-game-hack PDF link annotation
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://code.giftcards.comIn 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_off00005797.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5797 24636 bytes
SHA-256: 95d3dc5f5dc6a1b61f1454b1d2a177471f55aae2cf23adf42cde157c4c547833
font_01_sfnt_off00009028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9028 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000099db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99DB 17888 bytes
SHA-256: 58cd9c25f2055972b1f3d8fd7725b840dc665585bc5f994aadd02011a7a39e9c

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