Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81821dbaf8f2295…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 14:48:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 175dd214ebaa5eb457ac3eae5a353e1f SHA-1: f2c88b7f39555a3861df34c2cc153d488ceda215 SHA-256: f81821dbaf8f229517fe7fa95fdd5978c0493fd443cb2109b508946814776b11
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 0.9865

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.online/app/431946152/how-to-get-free-robux-for-kids-game-hack PDF link annotation
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.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_off00005341.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5341 24352 bytes
SHA-256: 13701480a65c937f9d68d055614eb22a154cbab546ffa273b1a41e3cd0bc89aa
font_01_sfnt_off00008ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE2 18576 bytes
SHA-256: d8259766cf036cd113d0b26237eaaf1c704bfb1290fa2ba3336ef80e6ae93167

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