Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a8a948f92ee0aa…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 23:38:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f04bb37b73c119e302d8112e64ada20f SHA-1: 1ee5f676760e1e3b28aa8d07c19cb0b7fd86864b SHA-256: 43a8a948f92ee0aabc98a321447ec9be1536b30c75bb63352ddd3e8cb82836d9
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 0.9864

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-make-a-roblox-group-for-free-game-hack PDF link annotation
    • http://opac.acehresearch.org/repository/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-use-racist-dolphin-on-free-exploiter-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/pubg-uc-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/robux-page_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/pubg-uc-hack-xda_GM1330123889.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-haktuts_GM406889139.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_004_off000053dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53DD 25132 bytes
SHA-256: 8d088d8499000c6e5f1141a5f02dbe89015763b74a3d6fbb0392617a842756d1
font_01_sfnt_off00008dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCD 19020 bytes
SHA-256: d86a0664516f84ca778de604dc8f5b6c02622b942defeefdc42ca528d3381c5a

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