Malicious PDF — malware analysis report

Static analysis result for SHA-256 0688013fb76b41fb…

MALICIOUS

PDF

45.6 KB Created: 2021-05-13 11:01:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aaf1fb771010e5dee05c6b583049afb8 SHA-1: 652b3111ee5c2ad44d0e382ff8dada26b9e751fa SHA-256: 0688013fb76b41fb790cf4de9881b089e3953dc73e15f71cb447ae175325458a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for linking to a 'free generator / game hack' lure, specifically pointing to the URL https://netcdn.xyz/app/431946152/orewards-com-free-robux-game-hack. This suggests the document is designed to trick users into visiting a potentially malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or social engineering attempt, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/orewards-com-free-robux-game-hack PDF link annotation
    • https://www.brainpads.com/images/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/roblox-e-free_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/www-rubux_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/getrobux-now_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/how-to-hack-roblox-on-mobile_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_003_off0000450a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x450A 27036 bytes
SHA-256: 9824df35c6458cc979d0b0d8428446847c1266188ef1ae0eb84d4e04229c51e0
font_01_sfnt_off00008121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8121 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00008dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC8 18840 bytes
SHA-256: db65450964d7be290e65cdc2a92251ec8b560453bbe28e14c4f3d4713211f4b7

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