Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a32e6dff73f2ca5…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 12:00:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 21cbeab3bead7318c28bb8937f6e3ca8 SHA-1: ab898bde487cc1d052152ee5595675136bb344cb SHA-256: 4a32e6dff73f2ca512671352efdeffc0a44e6cc7a2ece54ca4d0b46ad28ba78d
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--hack-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/hack-client_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-earner_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-websites-that-actually-work-2021_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_off000051aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AA 25288 bytes
SHA-256: 9fa8490102995a13ac2db766aaf010555444a260159ae09ad04a7c7a5738f037
font_01_sfnt_off00008be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE9 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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