Malicious PDF — malware analysis report

Static analysis result for SHA-256 71fafa4832ec760a…

MALICIOUS

PDF

42.5 KB Created: 2021-06-04 09:50:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c33653d03748c690536f8146745258b0 SHA-1: 2be2732376ac0e8c947a9ad19c3d925f9c07465b SHA-256: 71fafa4832ec760ac5c4169a117a97891fb0d8e0123808da79eefaa0738fc69e
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 0.9874

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/1330123889/code-for-pubg-uc-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/pokemon-go-free-and-inter-egg-sting-development_GM1094591345.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/tiktok-free-2021-views_GM835599320.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_off00004c6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C6F 24224 bytes
SHA-256: 6eedcd3bd63ab6144f94ed459b9447e0ddea2164e3cdfa18f9fe67373763c305
font_01_sfnt_off00008356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8356 18376 bytes
SHA-256: ab2b2d9a2fb46712ecfe623ccaf22716148d4a9e9460ec549f35bc4c594f5ade

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