Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadf36d29064d09f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-19 20:21:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5f926d7070e2b7ba435598620565eab0 SHA-1: 1401aaa0196442848b3d2e41155f2a7f52648a60 SHA-256: fadf36d29064d09f6406c542fa5a84cc3daac181adbb2bd6b585212fd4c1e237
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 redirector, specifically for Coin Master. The embedded URLs and document body text reinforce this lure, aiming to trick users into visiting malicious sites. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious download or phishing page.

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-free-spins-promo-code-game-hack PDF link annotation
    • https://fortiusconsultancy.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://fortiusconsultancy.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://fortiusconsultancy.com/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fortiusconsultancy.com/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://fortiusconsultancy.com/images/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • https://fortiusconsultancy.com/images/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://fortiusconsultancy.com/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://fortiusconsultancy.com/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://fortiusconsultancy.com/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://fortiusconsultancy.com/images/roblox-com-free-robux_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_off00002e7c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E7C 23564 bytes
SHA-256: a8c01fb766522d3d5ac5a2063a4401f7f723c7a4b77f81bd117bd9e3d58e9d25
font_01_sfnt_off000063e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 18476 bytes
SHA-256: dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a

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