Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3881335745e2f1f…

MALICIOUS

PDF

32.9 KB Created: 2021-07-20 09:41:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c2e4d9417d4cc859ad60f2b573e7dd82 SHA-1: 0af443e8525f93a9ce4798a01abe637e2b20fd91 SHA-256: f3881335745e2f1f3f84d8856c711778308226ae309be8afa2db5334c4d617af
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 0.8871

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/406889139/coin-master-hacks-game-hack PDF link annotation
    • http://learning.mafal2ngr.sch.id/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://learning.mafal2ngr.sch.id/__statics/gudangsoal/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5D 23320 bytes
SHA-256: ab0be963dd50872cd64fa85a29013ef67ce8d8506c2ea6f1738e8d00007d8943
font_01_sfnt_off000060f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F3 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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