Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bfb6841551d4b65…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 19:41:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 52f267bc857b67cdcc05330ed1b21e0a SHA-1: bbd7255aea449319cfa2139ae83fa1b497c6a662 SHA-256: 8bfb6841551d4b6535354e57e56fe48804d69cfc499528e454968b12bacdbd1e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a 'coin-master-hack-spins-app-game-hack' URL, which is flagged as a game hack redirector lure. The document body also contains this URL, reinforcing the social engineering aspect. While no scripts were extracted, the presence of external URIs and the nature of the lure suggest an attempt to redirect the user to a potentially malicious site for further exploitation or malware delivery.

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/406889139/coin-master-hack-spins-app-game-hack PDF link annotation
    • http://library.thamrin.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/where-to-put-scripts-for-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-cards-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-scroll-in-free-draw-roblox-saved-drawings_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-no-verification-2021_GM431946152.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/free-robux-only-1-step_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
font_00_sfnt_off00002e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E92 22576 bytes
SHA-256: acb949418e4bf4d0a070002659f44ba6ced8ed4137bb61a93f03df224b761771
font_01_sfnt_off000060e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E3 18180 bytes
SHA-256: 1e953b72540ec4677b5f3a09436cf02581c7252e246dbe5ac414cafa51ba2d5d

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