Malicious PDF — malware analysis report

Static analysis result for SHA-256 d162c02705a7b61d…

MALICIOUS

PDF

46.2 KB Created: 2021-05-16 09:47:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a5b70b378539dea704543b66f17bf1fa SHA-1: b72ee1562b957733c1a71050137030b14dfcbeba SHA-256: d162c02705a7b61dda07f9dc0ca2728f00bd202ddd519220eb1e1a3693f82e90
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a game hack redirect lure, pointing to a malicious URL. This URL, along with numerous other similar URLs found in the document, likely serves as a lure to download further malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/coinmaster-blogspot-game-hack PDF link annotation
    • http://vermaagri.com/uploaded_files/userfiles/files/google-moon-active_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/rbx-hut_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A86 26576 bytes
SHA-256: e9b7762a7b2f87a79947840ba6c565cc6df9984d1d83d5ae5578b90689cf9edd
font_01_sfnt_off0000879f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9150 18560 bytes
SHA-256: b6c1a4b4a396e514168379159069ddcbbdb2f4734aa5f4f24f50e1de42ff982a

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