Malicious PDF — malware analysis report

Static analysis result for SHA-256 8324ad6db2b83a77…

MALICIOUS

PDF

41.8 KB Created: 2021-05-19 03:39:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b7762df4283757a44f29452ae6eb106a SHA-1: 2e54c733744a34692df713762d001b91d316f545 SHA-256: 8324ad6db2b83a7799d4e185ea8f3c71c3af09f2ce0bbd3febd1e558cce81c53
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/1094591345/pokemon-go-free-8-bit-game-hack PDF link annotation
    • http://razredna-nastava.net/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-without-any-verification_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_003_off0000497e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497E 24464 bytes
SHA-256: 218a37a69f0ba2d00e0bc0d73f6281659498763add26a683a099ce95bcb8d83d
font_01_sfnt_off000080c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 18492 bytes
SHA-256: 89a2b056ccb985e36f91a42f126d58284b8dc80b7b4d594ad6cd7d3ce8be077a

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