Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4536e215167447…

MALICIOUS

PDF

50.8 KB Created: 2021-06-03 03:54:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 076b2aa2a60f484a3aecc44b0a4b1eef SHA-1: 8c95085f1c7ab9d424b836a40c4153c0ad49df64 SHA-256: 2f4536e2151674472875d7bb15fdafb4fabec8c00d497f13c51aa1d2f468868d
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 0.9744

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/roblox-speed-hack-game-hack PDF link annotation
    • http://aeridefense.com/image/data/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/where-to-buy-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-movie-websites-tiktok_GM835599320.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/robux-today_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/pubg-uc-usd_GM1330123889.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/robux-now_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-without-downloading-apps_GM431946152.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
stream_004_off00004f74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F74 30460 bytes
SHA-256: 86a643130ae66eec3e1ee9505037b4ec52f9b5cc361ff5335c475372ff837135
font_01_sfnt_off000097b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B7 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off0000a34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA34B 18532 bytes
SHA-256: ecd25e1cae784267f5a646f1b70b1ce742945d3ce40e95dc5b3aacf46c412aa4

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