Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e98b3c79a709c2…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 02:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31d4829e11c9c9fd37b974fd4ae4bd1d SHA-1: 93b51cc9b6043935038aa599f1a9dddc6257b9a9 SHA-256: c9e98b3c79a709c2e4abb076cd2edd40d79562220908b6be5e5965cce6c4e367
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 0.9971

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.xyz/app/479516143/minecraft-for-free-on-phone-game-hack PDF link annotation
    • http://repository.ummy.ac.id//repository/cone-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-pet-food-on-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_003_off00004df5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF5 25112 bytes
SHA-256: d4bb2c859cd7efa1411fd67d1b793976fc596ff63d2bdf7d19db7819fafc3df1
font_01_sfnt_off000086ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EA 18032 bytes
SHA-256: 03f24e9b7df13ddf2a61f787c3fe001e8b6ca75c509430b262bdd287118d54e8

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