Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efccdb9a7820972…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 18:46:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f75d96941b12c1f835d2269bf1fcde48 SHA-1: ba0139ac43c6a3036bad0a52eb761d4505c55c23 SHA-256: 1efccdb9a782097291342722e4bf8c2bd6f296fc0132c3a2220cddda488fe7da
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/406889139/free-coin-and-spin-in-coin-master-game-hack PDF link annotation
    • http://sttlets.education/senayan/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-mac-cheat-engine_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/zombie-strike-hack-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/rare-account-free-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-free-unlimited-robux-glitch_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/more-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/2021-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/bee-swarm-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-booga-booga-god-mode-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/codes-to-get-free-crowns-from-roblox_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
stream_002_off000030ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30AD 23116 bytes
SHA-256: 44fd3b0a115cf151bb21fddb88add8cb4a1a6fc15fbdb9ae9d8db1436702dfdb
font_01_sfnt_off000064ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EF 18348 bytes
SHA-256: 6eeec23f3dc1a8fda715f091be12cf507421137203139fa633fe014a904a42c4

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