Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b9c27043a87d2d…

MALICIOUS

PDF

36.1 KB Created: 2021-05-20 20:43:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 10f948840137e6837b4992917cd1a547 SHA-1: 8852a444a29f259baf5332d448e01b7f01f6933b SHA-256: a4b9c27043a87d2d39ca1df67b3fcf40828c0738e07fe016463a154bb2f3f12c
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/431946152/how-do-you-hack-roblox-game-hack PDF link annotation
    • http://jasperfirstumc.com/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://jasperfirstumc.com/images/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/instagram-coin-master-free-spins_GM406889139.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
font_00_sfnt_off00003329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3329 24244 bytes
SHA-256: 98a30ecc00b33b50f7dd24f1b31319259a7d1505fe2102af25ea4835efccfd4a
font_01_sfnt_off000069eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 18816 bytes
SHA-256: d27b94fe1a8c05d6feb56d9a091a96145976f0feb7173cb46f16c8470fe3a7d8

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