Malicious PDF — malware analysis report

Static analysis result for SHA-256 8198c93957a5f890…

MALICIOUS

PDF

44.8 KB Created: 2021-06-08 15:23:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 65ca1b3ceea76332b8f3743a91b1775e SHA-1: a0729ab1f2c80f6f54f0c66dfbb84e88825a0097 SHA-256: 8198c93957a5f890ca83b13325471993c711657cc5fbe03e15bb9b32ebed0cac
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link to a game hack generator, disguised with a fake CAPTCHA lure to trick users into clicking. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/bird-simulator-roblox-coin-cheat-game-hack PDF link annotation
    • http://asiasieja.pl/images/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/free-spin-link_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A0 25140 bytes
SHA-256: 44f89d0976d9c9dc6ccfccf3caca45d233048becf620cf8aa68d5110c49860fe
font_01_sfnt_off00008aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA8 18976 bytes
SHA-256: 1d6c0b5e25dc837f7d6a122c4cfc14b161a7cd9275e8e6bc38ceefad631c4d91

Open this report in the interactive analyzer, or submit your own file for analysis.