Malicious PDF — malware analysis report

Static analysis result for SHA-256 d627e304c7caa505…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 13:17:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fa7a839118e249e5acbb626faf6f90af SHA-1: a99322520441f69d1cc81a697a7d06950993ce1d SHA-256: d627e304c7caa50540b7a2866d47e4da47009d9fc91632c756f4070348683d44
82 Risk Score

Malware Insights

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

The PDF contains a high-confidence heuristic firing for a game hack lure, directing users to a suspicious URL. The document body, though heavily obfuscated, contains references to game hacks and the same suspicious URL. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be a social engineering lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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-daily-free-spins-25-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-free-views-2021_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-skins-ps4_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_004_off00004fc0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC0 24720 bytes
SHA-256: 0d70435ec7f5d8b6684ff2c2c697d4256e4719d1c16247c02fe36d8bfc75a473
font_01_sfnt_off00008823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8823 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000091d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D5 18568 bytes
SHA-256: b4b281bb5b6dfe092bf3b90adf491610ab408f1d3fe0f6ae1605b441ac4007a5

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