Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d4b8bebccfee99…

MALICIOUS

PDF

48.0 KB Created: 2021-05-16 01:17:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d690933a729be1007938277c36c4ee5f SHA-1: a9ad3d2f3f46ea7562bbffb298bc38f182d88aa9 SHA-256: b1d4b8bebccfee993ac60eac71703259611a412d1e6e217eea56367678cd4782
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 0.8715

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/479516143/all-minecraft-handbooks-game-hack PDF link annotation
    • http://alexandergroep.nl/images/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/roblox-system_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/block-best-robux_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/weird-roblox_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/coin-master_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://alexandergroep.nl/images/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ae9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE9 25676 bytes
SHA-256: 9049b77768b977d139191844707c8aaaf8ade2a21be9c31676dec2542433f416
font_01_sfnt_off0000849a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x849A 3020 bytes
SHA-256: f1a29adcea636583330be8db4f6466410de551ac48576b9e1aa5c34e2d665a1f
font_02_sfnt_off00008eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEF 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off00009900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9900 18288 bytes
SHA-256: 5a9d9a2d75510eb0bc442f8a3b024e4c465c86c421800e1b66ac1627d8202c2e

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