Malicious PDF — malware analysis report

Static analysis result for SHA-256 438ff542abebf11c…

MALICIOUS

PDF

36.4 KB Created: 2021-05-20 18:38:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f3ad86ed559f26de1c247361681fb1f8 SHA-1: 2eb600f9cf5f612758a5084236d2f54d5b6c4fc5 SHA-256: 438ff542abebf11cf97e047d352888365130eb8ee9da3ee3ef711c2ce2bbf64d
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/479516143/free-minecraft-skins-game-hack PDF link annotation
    • https://lesegais.ru/images/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/pokemon-go-free-mewtwo-hack_GM1094591345.pdfIn PDF document text
    • https://lesegais.ru/images/ear-free-spins-for-coin-master_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_off000035ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35AE 25432 bytes
SHA-256: 14e81984518b2d7cd7260ce4e8a20dc6210977447bc9d30a30c41e6000f07fc2
font_01_sfnt_off00006eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEC 17740 bytes
SHA-256: 14879269a8559ae987a62032ee6d1223d63a0cf7b4214af4691cfda5a28d5ffa

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