Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef145f9055e4f7f…

MALICIOUS

PDF

35.1 KB Created: 2021-05-23 03:39:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bdf9ec7d23b333a6f6a81ea43558624b SHA-1: 3e0fa3ee2718f3fedde582a2904eb5386dae6c33 SHA-256: 4ef145f9055e4f7f11852f500088f94e9a178176b4db053458ae3b7cc6e45203
82 Risk Score

Malware Insights

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

This PDF document employs a lure related to 'free likes on TikTok' and 'game hacks' to entice users. It contains a high-risk PDF_GAME_HACK_REDIRECT_LURE heuristic firing, indicating that embedded links, such as the one pointing to 'https://netcdn.xyz/app/835599320/how-to-get-free-likes-on-tiktok-game-hack', are designed to redirect users to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/835599320/how-to-get-free-likes-on-tiktok-game-hack PDF link annotation
    • https://elearning.min8blitar.sch.id/__statics/gudangsoal/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://elearning.min8blitar.sch.id/__statics/gudangsoal/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min8blitar.sch.id/__statics/gudangsoal/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.min8blitar.sch.id/__statics/gudangsoal/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.min8blitar.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link-today_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_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 24212 bytes
SHA-256: d1f91208efdc82b7f1dd77b1288fced481e624057e31a5f5f1d368ef4824bb3e
font_01_sfnt_off000069b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 17620 bytes
SHA-256: 1c33fd3c5ea4f422d018a8404ca3ef9e1ac10e3d86ac92994d8eaeb97cd646a5

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