Malicious PDF — malware analysis report

Static analysis result for SHA-256 18abda8088ac43d2…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 02:31:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 99fb3211f0f03e9ee1a0bc453ce04b51 SHA-1: 615b5fd376564ad2b6a560b26890bf1e8abcc3fd SHA-256: 18abda8088ac43d2a0f68679bb20facf1dda8671383b193edf39dc1cc1d2a615
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 0.9865

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/406889139/coin-master-free-coins-links-2021-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/pubg-uc-kharidna-hai_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-exe_GM431946152.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_004_off0000524b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524B 24956 bytes
SHA-256: d4bf47670b8d841c6b7a4aed09b06db7a9a017d4eb30d631d8d393bcd7854572
font_01_sfnt_off00008bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB4 18284 bytes
SHA-256: be459003f2db1a934c49859962f2962ce704e042ee0985c73311b64c11e09449

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