Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6a3450d819f33d…

MALICIOUS

PDF

31.4 KB Created: 2021-07-19 05:46:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b2cc223e02c71f8ed2f94eddd3265e6a SHA-1: 48ebc7521848d92c8d44b1d8fc7db62016dc93f2 SHA-256: 2a6a3450d819f33df3875e72538d1eacb3d3910480f3ff2a5e591abca40814b5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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.tw/app/479516143/minecraft-for-ipad-free-game-hack PDF link annotation
    • https://seniorenverband-brh-nds.de/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://seniorenverband-brh-nds.de/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://seniorenverband-brh-nds.de/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://seniorenverband-brh-nds.de/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://seniorenverband-brh-nds.de/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://seniorenverband-brh-nds.de/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://seniorenverband-brh-nds.de/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://seniorenverband-brh-nds.de/images/is-minecraft-free-on-pc_GM479516143.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_off00002a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A26 21648 bytes
SHA-256: 5fe9d68da337bff34c8bb2ba95e746fd2ef419f251c114725e2a410fc8f892f8
font_01_sfnt_off0000593d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593D 18060 bytes
SHA-256: e7041c736bb680ef9c5afd20c9d1b3857fb6e2c22e525da80690d2251a0ac91e

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