Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d0cb527f15b106…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 23:30:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4b48b4dbe2c4e650724ff36a4ef0e582 SHA-1: a9a281dae14e9eaa9e3ecf4423b5c0e6d0203714 SHA-256: c7d0cb527f15b10647bd0d5bbe11d4e635958017108660909537b2087bba1f28
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 0.9969

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/431946152/free-robux-app-game-hack PDF link annotation
    • http://projectunionstreet.com/library/repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-34-5-hack_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_off00004ca4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA4 25888 bytes
SHA-256: c231967bb52def96b7fb6c717d7ff424034491157bd0715de5e2e760bc70f51d
font_01_sfnt_off00008823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8823 18192 bytes
SHA-256: b6ab7ec8c8ad827553cf0587115e299062cd48018093aec7e14a56fabc9ede42

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