Malicious PDF — malware analysis report

Static analysis result for SHA-256 803abeb3bda3d2b4…

MALICIOUS

PDF

43.3 KB Created: 2021-05-20 07:09:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 20303b08c476f7eedd0424bfad1281d7 SHA-1: 1ec4167fb04134235032efad953a463b7fee3c40 SHA-256: 803abeb3bda3d2b437d77b7da2a3ea75d54d2f14a01557f7b0c74189ade965e6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that are designed to lure users with promises of game hacks and free currency. The primary link, 'https://netcdn.xyz/app/835599320/tiktok-free-book-website-game-hack', and numerous others hosted on 'unilin21.ru' are indicative of a phishing or malware distribution scheme. The ML classifier also flagged this PDF as malicious, supporting the assessment that it is part of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/835599320/tiktok-free-book-website-game-hack PDF link annotation
    • http://unilin21.ru/images/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://unilin21.ru/images/free-robux-no-verification-no-download_GM431946152.pdfIn 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_off00004323.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4323 25020 bytes
SHA-256: 1a5a26dcbc4f98f0071ee6e95b68dad87859306652f1844af72955441fb3de9d
font_01_sfnt_off00007d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1F 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000872e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872E 18028 bytes
SHA-256: b33c4ba645c868f474bb2d5ceae1113765dc1a0d1d4bfd4877a8be800b37e893

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