Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff5944c57c00963…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 04:03:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 98dde84a90a94660877f23e95731552c SHA-1: 0396c821032e08053d5d0742a8e74673cce75958 SHA-256: cff5944c57c009634cfae48e8b8b9103ce62878443afb3454e11d53094839ea9
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 0.9980

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/431946152/free-robux-no-verification-at-all-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/robux-adder_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-roblox-accounts-counter-blox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-enter-passcode_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/ninja-animation-package-roblox-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-codes-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-without-downloading-anything_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_off00002ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DED 22600 bytes
SHA-256: f407ba1395c81d3986e8935ae5395c59186a506bf54bb796a18d4da631739ce9
font_01_sfnt_off0000608e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608E 19148 bytes
SHA-256: 5a0e9190e95b53368e7cb66d96866ddf92b1f6e1c3c90a967aca3b65a401f6e9

Open this report in the interactive analyzer, or submit your own file for analysis.