Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a516fa0705bb5a5…

MALICIOUS

PDF

35.9 KB Created: 2021-05-12 04:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 049e3a273f8c33b7e7f39c655afc5b2a SHA-1: edf554141d4f521b63958b322f213492be2c6438 SHA-256: 3a516fa0705bb5a5aa6742cadbdfd99e716c2e2841af029e9251b7f5765000bd
92 Risk Score

Malware Insights

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

The PDF contains a lure for a 'Minecraft Cheat Client' that redirects to a suspicious URL. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute a command, bypassing macro restrictions. The embedded URL and the social engineering lure suggest an attempt to trick the user into downloading and executing a malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/minecraft-cheat-client-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000034f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F0 24416 bytes
SHA-256: a225b929a3d156d821edb4f88ed9da50248e8eb543938b12f67b486a0c0c99e4
font_01_sfnt_off00006cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDC 17808 bytes
SHA-256: ae4d3a4e8db3c535571974f20d29f774c055cc29dc4a6064f071376039008cf0

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