Malicious PDF — malware analysis report

Static analysis result for SHA-256 733d40088a685e07…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 12:18:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1e6ff34f983238afe99ce82220979e8a SHA-1: 161a3184dda2eea5b8e2f3a7f466a313766c7f7f SHA-256: 733d40088a685e07c514fe46010c1b3a7ba8aed66374a0b161fe8c4b6ba09185
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9864

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/free-green-hat-roblox-game-hack PDF link annotation
    • http://rsudtenriawarubone.com/perpustakaan//repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-level-7-script-for-roblox_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/roblox-arsenal-hacks-download_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
stream_004_off00004e77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E77 28412 bytes
SHA-256: 04d7e16128928cada00c8b1f44775b3445f58ded52093c42b12438c2ac1b3cbb
font_01_sfnt_off00008e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7C 18280 bytes
SHA-256: a1356a91db600e6d19b5d5e4d7c2eb437eceeed5f45de079382276db9ce81c9e

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