Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6421eee8f0e18d…

MALICIOUS

PDF

35.3 KB Created: 2021-05-23 06:07:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c1472e331bcb5f7fbfbeb25bcfb322a6 SHA-1: 22dea5041f0aa794150229e8b3ea2780eee433a5 SHA-256: 7e6421eee8f0e18dc23a15b247fd29774b1bc81effd9c6c1a0ae4a685df852f2
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 0.9492

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/835599320/free-views-tiktok-game-hack PDF link annotation
    • http://iprep-u.com/images/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://iprep-u.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://iprep-u.com/images/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://iprep-u.com/images/wurst-115_GM479516143.pdfIn PDF document text
    • http://iprep-u.com/images/ways-to-get-free-robux-2021_GM431946152.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_002_off000032c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32C3 24176 bytes
SHA-256: 925922ce4a5200827f7cb6f9b4641b6a2ae13848d74e3de196962dbc57f3afb8
font_01_sfnt_off00006a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A04 17752 bytes
SHA-256: ce4f969b492885a6292b68f2810015e61170a5a05df2656d5db0dd0870788c0b

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