Malicious PDF — malware analysis report

Static analysis result for SHA-256 a152bbf04f09ad77…

MALICIOUS

PDF

36.1 KB Created: 2021-05-25 10:33:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 268acab84729cccbfccc6edf0556214d SHA-1: 403798e7a42dbeebe6ebd66d836914c998ca69b6 SHA-256: a152bbf04f09ad77677cc0103e9065fe7d4e9a1c6214bf35dee1b9389a9f0e21
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 0.9648

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/479516143/how-to-start-a-minecraft-server-for-free-game-hack PDF link annotation
    • https://mtsn4blitar.online/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • https://mtsn4blitar.online/__statics/gudangsoal/files/coin-master-32-hack-apk-download_GM406889139.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_off000034b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34B8 24756 bytes
SHA-256: a1febaffc7ccbf1c27cfb7a67f74fb7cdd1d18ef311d6347d3db0f8d9150962d
font_01_sfnt_off00006c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C91 17988 bytes
SHA-256: 4f50b9796c9c5e6e2841d90a47ce680cd3d0047611852497406c2f0c8cfa935a

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