Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d918d4811d38556…

MALICIOUS

PDF

41.8 KB Created: 2021-05-20 20:06:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2779c41d603b7be9f4b6602e3883f7b8 SHA-1: 84b8df42e03fe9a121297bb09bf78d1404e78846 SHA-256: 9d918d4811d38556c7acc997b68d4fd0dd68a735e4368595b8c114f610b9295b
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 0.8078

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/if-i-uninstall-minecraft-can-i-reinstall-it-for-free-game-hack PDF link annotation
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/robux-converter_GM431946152.pdfIn PDF document text
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003627.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3627 24920 bytes
SHA-256: a8858b7f6cfd2ddcfc7d00665faee736f6071981606bb2d5b0b476a157c618ee
font_01_sfnt_off00006e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E29 3020 bytes
SHA-256: f1a29adcea636583330be8db4f6466410de551ac48576b9e1aa5c34e2d665a1f
font_02_sfnt_off0000787e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787E 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000828f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828F 17972 bytes
SHA-256: 58848056166ef862e589a8a767e64d1dece6368d26464edd619a575d32e976bf

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