Malicious PDF — malware analysis report

Static analysis result for SHA-256 203e01ddd6a051dc…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 01:45:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 444080a0726f87e8d127dd3b0e2b7ed5 SHA-1: eab6ad90f327701c5dd72ef0deba2fe425cadd49 SHA-256: 203e01ddd6a051dca8ae576f10276fd7dec76cfe82aed7de3d5d97079f91ff2e
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free Robux generator' and a 'game hack', directing users to a suspicious URL. This indicates a social engineering tactic to trick users into visiting a potentially malicious site. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/rbl-gg-free-robux-game-hack PDF link annotation
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/how-to-hack-people-in-roblox_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
stream_002_off0000314c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x314C 24876 bytes
SHA-256: a016d7a79de5d114eee6cd762ba203f4498314c5133c2e415db81a8a00808474
font_01_sfnt_off00006abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABD 19796 bytes
SHA-256: 9d355db9863550a6b921420ab3f6468e450200e57ee504889615bd4ce06f80e2

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