Malicious PDF — malware analysis report

Static analysis result for SHA-256 57eb8930c65b7469…

MALICIOUS

PDF

47.7 KB Created: 2021-06-11 01:26:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cd13155edc230b822dd591a629b4b1af SHA-1: 13bfb33d9752a398ac344ebe112bd557c6454d38 SHA-256: 57eb8930c65b746956bdac0edf1667dbe30768984a533ee73ce57a84fef8cea6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, specifically linking to a URL that likely hosts malicious content. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a phishing or scam attempt to trick users into downloading potentially harmful files or visiting compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/roblox-fly-hack-download-2021-game-hack PDF link annotation
    • http://pia2000.net/images/free-cinema-4d-lightroom-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/roblox-weird_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-no-human-verification-2021-real_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/why-you-shouldnt-trust-free-robux-scams_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/how-to-insert-lua-script-into-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/script-executor-roblox-free_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_004_off000050fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50FC 25244 bytes
SHA-256: f44ad12b050a0e86fac5022ad7a32b921706a7d4f93479cf100912a7791b29ef
font_01_sfnt_off00008a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A36 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000093e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E5 19436 bytes
SHA-256: 76f44114a2748e7ccc58c3565c1592f777336162330d299543d07c266737ab66

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