Malicious PDF — malware analysis report

Static analysis result for SHA-256 faefb92dd4e9ab47…

MALICIOUS

PDF

45.9 KB Created: 2021-05-15 23:12:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7c4fe1a5de498cdd9f2508f2958e7df6 SHA-1: 7d7015d5983cd6f60df751c75a63843cf88337ad SHA-256: faefb92dd4e9ab47b92f8d166273ec2b2187f388c557845af5a3143d56094af7
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 0.9432

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.xyz/app/431946152/get-free-robux-without-doing-anything-game-hack PDF link annotation
    • http://fishboat.hr/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/robux-online_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49AF 25164 bytes
SHA-256: a7a06464ada7d3a9cfe8d7a60863fcd7b7cb8d1ad2bdca300e3bf2b1d816ae21
font_01_sfnt_off000083bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BD 2956 bytes
SHA-256: bab8933fc39dc331bc4c1c904a82b1432ab2e02478fa0a59453c98c5c231da8d
font_02_sfnt_off00008ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDD 19240 bytes
SHA-256: a9e3aa10522a438dd9eef37bb3e7f322f16e38379d063b4a50e22a05dda2bc13

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