Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4190fc1cfc9f4ef…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 04:10:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2393b7b3aaf635bf52ff76ebd9688ee2 SHA-1: d7e76fc0b1fd75a0cf6e56e1092fa33af4e234c9 SHA-256: a4190fc1cfc9f4ef79ba5ffd3bf599455d37ab2c1b53d16311e11fba41a7a6f6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-confidence heuristic firing for a game hack lure, directing users to a specific URL. The document body also contains this URL, reinforcing the lure. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-guess-the-emoji-cheat-game-hack PDF link annotation
    • http://ipdrs.org/images/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/mining-saimulator-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/robloxcom-free-dominus_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-images_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE7 22208 bytes
SHA-256: 9485796010ae7fc62378d52dfa1730eec5a6eb28cd71d85f93a2b3e4fb475605
font_01_sfnt_off00005f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2B 19280 bytes
SHA-256: afd4c58e98434e3e057b393d42b8b7ef0983cef5b57e244f9f6426669c70c409

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