Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b35b6decf9a14c7…

MALICIOUS

PDF

34.3 KB Created: 2021-07-20 00:07:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e3cb6bdf47129bcd392fc27c236ccaef SHA-1: b87b0eec6fed691f2b62d5119aed95bc10d47202 SHA-256: 9b35b6decf9a14c733daa019982960c34195ab85e1f847fc7e0445dc3cb6c905
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure, specifically targeting 'Coin Master' and 'Robux' generators. The embedded URLs and document body text reinforce this, directing users to potentially malicious sites. While no scripts were directly extracted, the PDF structure itself facilitates these malicious redirects, likely serving as a lure for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/406889139/coin-master-daily-free-spins-and-coins-game-hack PDF link annotation
    • https://itv-grabungen.de/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-com-free_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spin-ml_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002dcd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DCD 23840 bytes
SHA-256: 0c4aa78506d34f353c6b1d2f012ea3e704ce7191a4cc46a6bacdb93d73943bca
font_01_sfnt_off000063b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B2 18480 bytes
SHA-256: 323fea871d3154f9ddf991b22fd859b77165b4ee4e2d03de0fe4666202988bbb

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